Hello everyone, very good evening, welcome. To Vedanta Telugu Channel My name is Ramadevi You all also call me KRD Mum. So welcome to that power pact session. Everyone knows the name of today's session. I think The Most Wanted The Most Wanted Not in the mind, not for the optics of the yogurt. Turn I need to talk about its weightage. No need, you tell me yourself, Madam, in 25 How many out of 26 questions did you get? So come the same ray optics weightage But I don't think it will decrease. What kind of weightage did you get in Same 25? 26 It may also have almost the same weightage in However, along with Ray Optics in 26 Whatever the electricity track is Electricity and Electromagnetism Whatever the track is, it also has weightage. It increases, so whoever does well Practice and get good marks. Everyone who wants to get it, Ray. Optics Static Electricity Current Electricity Moving Charges and Magnetism is a little better at all of these. Concentrate. Okay so welcome to the Session that Hi Mom, your remedy worked well. Are you the one with sinusitis? I will follow you, that's why I gave you Suggestion works. Okay, so first of all, I'm still commenting. Why can't I answer right now? It's already started late because that's it. It hasn't started. Let me start. What about the paid session so far? 6x from one o'clock to 9 o'clock three I said hours of paid sessions, now again. Let's play for three hours. Class What is the maximum duration I will Try to keep it for hours, all hours. It will be over in the middle. Madam, I have not been here so far. Can I see this class without touching the optics? Look, I'm trying to do this class as much as possible. So much more with so few shortcuts I will try to provide content. This After listening to the video, I Confidence in being able to solve problems But I can convince you. Also, just listen to this one video. You will do problems in JE Mains. I can't say such things because... Optics is what it needs a lot of. Practice, you listen to the class like this and do that. Problems first, a little bit. There is friction. But because of listening to the class That friction is slightly reduced, kinetic. Static is the word that turns into friction. Friction is like kinetic friction. Maruti is now friction again. You might get confused listening to this class anyway. It will make you lose your fear of ray optics. First point number one point number The point where confidence comes in you. After class number three is over I will explain the problems in class. After some models finish class You can also sit down and practice PYQs. Okay, let's go in. Into the topic, what are we doing here? What should I learn? What should I learn in detail? That means first of all reflection. Reflection at Plane Surface and Curved Surface Later refraction That too. That too at plane surface and curved After surface refraction is over About Something Called Prism Let's learn and this is what Total internal plane in refraction itself That means the glass slab is the lens. Everything is covered here, then Prism. If there is anything else, small applications Let's talk about applications, if any. It's a very short chapter, so watch it. Tuk tuk tuk is over, little by little Okay, so that's it, that's all for the small topics. Easy Let's Start With Something Called Reflection That is also reflection at plane mirror. Let's speed this up a bit because What we have in a plane mirror is There will be an incredible depth of questions. That means even if a question like that comes up, You don't want to be bothered, so I will try my best to give as much as I can. You are the content first of all plane. Where does the surface start? That is, from the Law of Reflection This is our plane mirror that starts. If you think so, then this is called normal. Then an incident happened and it was If you think it's fallen, then this is it. Incident Ray This is our incident ray incident ray Angle towards the mirror will be then This is our reflected ray. The Angle of Incident This Is Yangle of Incident This is Yangle We lose our sense of reflection. What does reflection say about the Laws of Before I say reflection, I will Give you something called direction because In this lesson we will deal with light rays. Optics is where light is in the form of rays. What does ray mean? It has an aro. Direction Matters Here Direction There will be. So here's another little one. I will tell you a problem-solving trick. See There is a problem solving Trick entire ray optics to sum You can apply. A ray towards the Whether the mirror comes or not is an incident ray. When did the incident occur? When should a mirror be reflected? You should also stay away from the mirror. Now Let's name it as I CapR Cap. That is, the incident ray direction Reflected Ray Direction and n Cap is the direction of the normal Represents. Normal is Do you know what normal means? Mirror Perpendicular normal to the surface Why do you draw on the surface of a mirror? Perpendicular First Law of What does reflection say? I cap a cap a Cap all lie in the same plane This is what the First Law of Reflection says. What does the Second Law of Reflection say? YoungI is always equal to YoungR. Next is over, what more can be said about this? No, next, there's a lot of this. What is important is the vector form. Of Laws of Reflection Vector form in Laws of Reflection I don't know why, but in this lesson... Some favorite spots for NTA That's all from those favorite spots. There was no NTA without asking questions. One of the favorite topics in it Vector form of loss of reflection Which of the following is correct? Expression for vector form of loss He will keep asking off reflection. Standard question even effected Also listen to the formula compulsorily memorized Make r cap equal r cap = i cap -2 EI CAPDATA Cap *A cap Madam Asthma like this It has various names, not just names. For example, this is a cap. This is a B cap, this is a C cap. I gave it to you, A, B, C. You should also know how to write in caps. First of all reflection incident Times of incidence are normal so how Formula B is written Cap = a cap - 2 * a cap dot c Cap *C Cap you will give iJekale No rule i1i2abc He changes the names no matter what. So you have incident ray reflected ray These are the names you should learn. Compulsory naming of change Changes. So to grasp the logic of this Try it, this is point number one. What we need to learn in reflection A little further in the next reflection Let's go, we've covered the basics. Let's start from scratch. Everything from Scratch Next There is something called the angle of deviation. The angle of deviation is delta. Represents the angle of What is deviation if there is no mirror? If it weren't for this, this ray of light would have gone like this. But the light ray mirror that should go like this It went like this because of being. So how much is it? It's become so confusing. Now we Very simple logic, this total is 180° so Here we apply the logic 180° = We know angle i + angle r + delta. Let's say i = that is i. So then What is the formula for delta? I get 180 - The formula for 2i delta is 180 - 2i here. We have a problem-solving technique. Here comes a problem-solving technique. What is it? Problem Solving Trick First of all problem solving trick What you need to know about Delta Huss Direction Delta Has Direction is Anti-Clockwise Clockwise, clockwise, you are positive. If you consider it anti-clockwise, You are definitely a negative thinker. Look at this example to see how to do it. What was supposed to go went like this, so deviation In which direction is anti-clockwise? The direction is anti-clockwise. Clockwise two clicks should be made. Then Delta Total is always equal To DeltaVap DeltaTup Delta3p and so on On Along With The Convention What's the trick in this? These too. What is the trick, first of all? In case of Mirrors with a twist In Case of Mirrors with Youngle Between you two mirrors. There is some angle between them. He gave this is mirror one and this This mirror is the angle between these two. If you mention me, I will. So if you mention it, you'll get more out of it. What does an incident from here give? It came, it was reflected again. Reflected. Now you have two. Times deviation occurred Total two times Deviation has occurred. So this is delta. If the total is simply 2π - 2θ It's over. Delta total is simply 2π - 2θ. When will this work out for you? Angle between two mirrors If you didn't know when you knew, Geometry must be used in mathematics. Triangle is geometry, right? Angles are what we should use. On this A simple example is what we already have. We've done this before, so this is m1, this is m2. The angle in the middle is 75 degrees. Then What did you say after reflecting? Mirror m1 It gets reflected back by the mirror. m2 with an angle of 30 degrees m2 The angle of reflection is 30 degrees. Total deviation of the ray first of all If you use a shortcut in this, you If you apply a shortcut Delta Total = 2π -2θ so 360 - 2 times 75 so 360 - 2= 10 2 7 14 150 So the answer is 210 degrees, this is the simple way. Now I will tell you the full method as well. Look, if it's not because of us, then it's because of me. What should I do if the formula doesn't come? I forgot how to apply geometry. Let's see that too once. So this. This is named m2 This is named m1 And between the two, 75 grams is your question. What did the incident on the first M1 say? It came like this, then it came like this Gone. Here's your angle. The incident was given as a reflection. It was given to you, it gave you 30°. Then the angle of incidence is also 30 There will be a degree, this is 30 degrees, but here How much is 60 degrees? Then what is this angle? It turns out to be 180 - 75p 60 so What is the answer? 7 13 Answer is 45° So Here you got 45 then you got this too It becomes 45°. That deviation should be taken. Deviation is like this, first of all To go First, this is an incident. It went like this. Next It was supposed to go like this, it went like this. So me There are two deviations. This is one. Number one deviation next this is number How is two deviations delta one? How is DeltaOne? Anti-Clock Vice How is Delta? Anti-Clockwise So It's a simple matter of combining the two. Delta 180 - 2i So 180 - 2 Times 45 So 90g Next Delta = 180 -2 e is its angle Of incidence 30 grams so how much here I get 120°, right? Look at 120+ 90. Delta Total Equals Two Anti-Clock Vice will be added. So 90 + 120 so that is 210 so this model Must know shortcut I want to know everything, no matter what model. To give to us We must be ready. Okay, so that's it for now on the angle of deviation. Enough Next Rotating Mirror You all know how to rotate a mirror. What happens if we do this? So let's analyze. Consider this is the initial condition of Mirror on this mirror this is the normal And that is what our incident was about. There is. Incident Ray Along the Normal What is the angle of incidence when? Incident Ray Along the Normal When the angle of incidence What happens at 0 degree angle? If the incidence is zero, then the angle of Refraction also becomes zero. So This is the incident, Ray. This is the incident. Refracted ray is the initial condition. Now what did I do? Rotate the mirror. I made the mirror here like this. I rotated it so I drew a new mirror. I will do it. How much angle θ is the angle I referred to? m but this is m dash mirror rotated So now draw normal. Normal is always in the mirror. We draw it perpendicularly, which is n. The incident happened, so there it is. Now what is the angle of incidence? This gives me the angle of incidence θ. θ but the angle of reflection is also θ It will be new to me now, reflected. Ray came here. Incident Ray is right there. Mirror Normal position due to rotation The reflected ray has changed. So what do we mean here? Where is the incident initially? The reflected ray is initially here. Finally, the reflected ray is here. How many angles did it turn? Finally What angle did the reflected ray rotate through? 2 Theta angle is rotated so when mirror Is rotated Through θeta angle then reflected ray Rotates How much 2 θ angle will it rotate. This is a Analysis Second Analysis Application That's called field of view. What is field of view in a mirror? Where in the mirror is the object placed? Will the image form some distance? The mirror only covers up to that. Then Beyond That Object Place If it does, it is not covered, it is fielded. It's called off view. For example, I am a Think of it as a mirror. This mirror Only cover this maximum distance. This is the maximum that can be done. Reflected Ray means you are in this range. You only place the object. You can see the object placed somewhere else. If we do, we won't see it, it's off field. It's called a view. There is a lot in this field of view. The important point is that Height of the image or size of the image The question of how much should be raised will arise. The first application of this To see His full image Of a man Off Height H There is a man whose height is H. He is his What should be seen as the full image? The size of the mirror then the size of The Mirror How much do you want? How much do you want? h/2 If a man is not a man properly, then anything The height h of an object is its complete image. What size mirror should I use to see? hേ/2 should be this is an application another What is the application? We have a hall. This is a hall, you are in this hall. You placed a mirror here. This is a mirror. You placed a mirror in a Buddodu this hall distance capital d Let's say the hall distance is capital d. Correctly d/2 in distance d/2 A boy stood in the distance. What is the purpose of this wall behind this door? The full image of the wall, if any. What is the condition to see? Full image Off Wall Behind Him Size of the mirror Everyone knows the answer to how much it will cost, right? What is the size of the mirror? Answer Say 3/2h a. Not 3/2H Force question in gravity class Components on You are the user ID Parvati Goshala51. Follow my classes correctly and regularly. But in what case is a vector This is what I need to resolve into components. I keep saying it in almost every class. I will be there. Parvati Goshala 51 When a A vector can be a force. Gravitational field can become electric The field can be a magnetic field. Maybe torque maybe velocity Acceleration is any vector that makes an angle. If you make it, it has to be resolved into Two components Answer h/3 d/3 Very good super answer How much is h/3 d/3 not h/3 d/3 not h/ /3 d/3 not/3 Okay, let's go to the height H. There should be a h/3 size mirror. Okay, fine. Now, our question will be given like this. What's up? He's right in the middle of the hall. If you stand, this is the condition, but not like that. He is at a distance of d/3 from the mirror. Mirror is at a distance of 34. He is 1/4 distance from the mirror. You can ask various questions from the mirror. Correctly in the hall at half distance He stood up then H/3 okay you know But the same mirror is from distance/2 to distance/3. Distance 3h/f 3d/4 distance What should I do if I am given that? KRD Mom is a short cut to that. They say the formula is: If n is Fraction Off Distance From the mirror n is fraction of distance from Mirror then size of mirror Formula Size of Mirror Maybe this formula is for me Who wouldn't know and say this is in Pearson's book? There is, check it out if you want. This formula is not available in Irudava, but it is good. Useful formula is so size of the What is the formula for this for the mirror? nh/a+th Super duper good formula Formula Eh/A+W What is the super formula in which n Observe the fraction carefully. Do n What should we take Fraction Apply the fraction here and see in this How much should be taken in place of fraction A 1/2 Then put 1/2 here and see 1/2h/3/2 h/3 came in this 3/2 distance There is n place, take 3/2 and take 1/3. He is at a distance of n places 1/3. Take it, it is 1/4 the distance. Now you take 1/4 in place of Even if it's at a distance, stand up for him. You will get an answer. Okay so this is a Memorize a good formula well. Super Formula is the name of the game, so this is the field of Applications related to view Even bigger applications in the mirror Why don't we go directly to Velocity of object Velocity of This is a very important thing in the image mirror. We all know the formula well in the mirror. Where does the image form correctly? How far away is the object? The image is also at the same distance. We know the basics, so now we What is the name of the concept that is going to go? Velocity Off Object And image Velocity of object image so we have Let's say there is a mirror. This mirror We know exactly what the player is. At what distance is the object on the mirror? At what distance is the object located? The image is in the same line as it is. It is in the distance. Object 2 Imagine moving the image in centimeters. Which way does it move? Towards the right. Left object I object 2 I moved it a few centimeters this way. 2 Bring the centimeters here then. Does the image go right or left? That means the image also comes to the left 2 Centimeters Towards Mirror Shift It will be. When it shifts like this, it There is also speed, so we go directly. Let's do a task object in this direction. Going with the velocity of the object Let's say then the image is definitely also Velocity of going in this direction Remember the image well. To understand this To understand this concept You should know. You should Use vectors So whoever knows vectors basic, mother, do that. What is vector depth? Vectors If you know the basics, this concept is for you. It makes sense because this is all based Has anyone asked for directions yet? Madam, I want you to resolve this. Velocity is a vector. Whenever a vector is some Does it make an angle? It has to be Resolved into two components so this See how the component looks. How is this component mirrored? It is perpendicular to the plane of It is perpendicular to the mirror. So I call this the Velocity of The object is perpendicular to the mirror. Let's take a look at how this component is along the way. The plane of the mirror is so velocity of object parallel to plane of the Mirror Similar See This How It Is It is perpendicular to the mirror. So velocity of image perpendicular to Mirror Next How is this component? Velocity of image parallel to mirror The mirror is parallel to the plane. So Again we have the horizontal direction vertical. Direction is how we write it. Along the way How do you do it, Axis? Let's understand, okay? Plane Off Mirror Along the Plane of Mirror as well as Along How to understand the x axis Along Normal To Plane of Mirror I write you Look at the diagram here and understand. Madam normal says S plane off It's normal for the mirror to be you. It is important to read and understand. So Along Axis, look at both of them. Same magnitude with same speed Going in the direction that means here Relative speed is zero plus two. In the same direction as the velocity Going so along this direction Velocity of object parallel Equal to velocity of image parallel This is what you want, with respect to Mirror can be written with respect. Mirror can be written happily. Now come here, how is it? See if the two velocities are not the same. Vectors are in opposite directions. What happens in the opposite direction? Velocity of Mirror Perpendicular Velocity of object with respect To mirror equal opposite direction Minus Velocity of Image with Respect In a direction perpendicular to the mirror This is how we will go from here. You can proceed with the calculation. What do you know, Vabber? = vabar - vb bar Does everyone know or not? This equation so apply it here Ur = - v Bar so vo bar - vm bar = minus apply Do -v barpva If you want to get a bar so transpo, What happened to the velocity of the mirror equal? Velocity of object plus velocity Off Image /2 Super Important Formula What about velocity in mirrors? If you ask a question You can use this formula directly. Direct formula in the mirror as usual So far, so good, since substitution is a thing. Learn means I have never been here before. Those who say they haven't caught the optics yet Just understand at first look. You seem a little complicated. Write and practice with me once. It will be easy. It is all about Directions First of all to you. What you need to know is how fast the object is. If you move fast, the image will move at the same speed. Moves. Now if you look at it like this, it's the same. Speed ​​Same Direction So Same Speed Same direction positive positive like this Same speed, opposite direction We put a minus symbol for the opposite direction. Rest is normal calculation rest This is a normal calculation so this Velocity of object image is different from this What else should we learn from mirrors? That means the number of images formatted is one more. The point is that we need to learn the number of Images Famed When will the number of images be formed? That is, when there is an angle between Two mirrors, something between two mirrors How many numbers are off when you put an angle? Images will be formed so how many numbers of First of all, images will be formed. n= 360 / θ and n= 360/θ -1 n= 360/θ when n value is even Then okay or let me take a like This 360/ When θ is an even value, it is left as is. If you keep 360/ θ value Suppose you get an odd number, which means you get an even number of 5. Then you have to subtract. 360/ θ You will calculate its value even. It arrived. Leave it as it is, okay? Got -1 Chey Madam and Fraction If we round off, we get decimals. Fractions are not given if Karmakali gives them. Let's round off, whatever is nearby. The only digit in this is decimal. There are two things we can do about this. What are applications, so what are these? If placed on a symmetrical line, If not on the symmetrical line In symmetrical line then how to solve I'll tell you what to do, see if there are two. Mirrors Mirror One Mirror Between Them An object has been placed. Let us Take total angle 30 degrees object Where is the object placed? Is placed by making one 10 degrees The second is 20 grams. Now how many numbers of images form The results should be calculated. So When calculating things like this, I As usual, I'll tell you a trick, be careful. Watch the trick. What is the easy trick? Write the first total angle at the center. Write the name of Mirror One and the name of Mirror Two. Let's use a different color for mirror two, mirror. Write the names like one and mirror. Let's use the color Mirror One Yellow. That's it, jig. Mirror One is to go in the jog method. What is the first angle in 10 degrees? What is the first angle in the next mirror? Write 20 grams, then add 20+30. To make 20+ 30 50g 50+ 30 You have to go in zigzag again. I want to come here 50+ 30 how much 80 80+ 30 how much becomes 80+ 3010 0 110+ 3040 140+ 3070 170+ 30 is not greater than 180° more. If that turns 180 degrees, we still have a form to stop. It won't because it will form in a circle. What actually happens in this is Images are formed in a circle like this So 180° is 180° to this. The images are still not forming. Next Next start this 10+ 30 40° 40+ 30 70° 70+ 30 100° 100p 3030 130+ 3060 That's it then again 180 It will pass, so we still need to put it off. No. So mirror one lowatafsi This is a problem. Now how does the mirror ask the question? What angle is the second image in one? The second image in Mirror One has become a form. Third image in mirror at 50 degrees Where did the third form of Mirror Tale come from? Image is near 80°, this is a method ok Next, there is another method, see this. How do you ask a question in another way? Case of two parallel mirrors Mirrors are placed parallel, this is a Mirror one and mirror two The separation between these two is 6 meters. Let's say we have a normal object. Where did he put this object? At a distance of 2 meters from Mirror One He gave this question as normal. Two parallel plane mirrors How many numbers are there between them when Images will form an infinite number. The question is whether the images will be formed. What does Babu ask in Mirror One? At what distance was the image formed? What is the distance of the third image in the mirror? The form was fifth in Mirror One. At what distance was the image formed? Similar questions come up again and again. If it's not a trick, then this is the infinity form. There will be a limited number of The images will form again, the same father. The first thing you need to write is the total. Distance is written. Mirror One's name is written as Mirror One's name. How much distance is written in the mirror? It turns out that this is 2, but this is 8, this is four. So the mirror is 4 meters long. How far away is Mirror One? The distance is 2 meters, that's it. Wearing a tight, tight, tight, tight Leaving is 2+6 8+ 6 14+ 6 20+ 6 26 This is no limit to this ever. It's okay to keep writing. Now 4+6 is 10+6 16+ 6 22 22+6 28 now in the first mirror Where did the third image come from? First The third image in the mirror is 14 meters away. The form has become easy methods, in which we I have already solved one question so far. Most of this is in plane mirrors. Since there is not much variety of models You may feel the same way you did before. We have already done this in the past. We discussed. Between the two Total 10 centimeters mirror one How far is Mirror One from Mirror One? Suppose there is mirror AB and mirror A. How much is the object for Mirror A? It is in the distance. Next What is the distance between mirror A and mirror B? 10 -2 8 Put on more kachak kuchak. 8+ 10 is 18 18+ 10 is 28 Wear a scarf 2+ 10 12+ 10 22 What did our question ask now? Distance of second nearest image Behind the Mirror Mirror in Second Nearest answer 18m Easy questions are questions like this. We are already ready for this on the next one. We did this for the curved mirror. So let's make a curved mirror. So that's it in plane mirrors. Don't go too far, it's a long plane ride. Don't waste it on mirrors, just this one. If there are basic knowledge plane mirrors That's all, you don't need anything else. Now Vavil Move on to spherical mirrors. Let's go, we'll spend more time here. Must do. Not too much time, not too much. Number of Questions from Refraction Come. Spherical in the same reflection Concentrate more on mirrors Must do. Actually, even is a minus. Pettochamma Symmetric Non-Symmetric If it is non-symmetric, then it is negative. Comes. Ingenuity also comes in minus symmetric. Minus for a symmetrical even number They will put it. Symmetric in non-symmetric But since it's symmetric, it's even. It is also written as 360 -1. Okay, Spherical. We basically have two types of mirrors. There are mirrors. One is a concave mirror. The second one is a convex mirror. Don't get confused with 360/θ, it's symmetrical. There are two asymmetrical ones so you are basic. As 360/θ I put them all aside and said Just wear a mirror concept. Put the angle between the mirrors. It will be easy. Anyway concave mirror This is how you can see what the shape will look like. What is this called, principal axis pole? Center of curvature Focus center of Distance from curvature to pole Radius of curvature from focus to pole Distance Focal Length Next When it comes to convex mirror This is a convex mirror. This is a pole. But in reverse for a convex mirror It's on this side, it's in the center of it. Curvature Focus From the pole to the center of curvature Radius of curvature is this focal length okay Focal length to radius of curvature Do you know what the relationship is? Between focal length and radius of Curvature r/2 f = a/2 or r = 2f i You have an extremely high number of off. I won't tell you the formula, it's just a basic formula. I'll say whatever you want. The rest of them Bringing is easy so m = uf/ u+Eva/B -A/B is not a formula like that. Don't beat them, they are the only ones that need any formula. Let's learn today because of clumsiness. You shouldn't listen to class today. You need to gain confidence, that's all you need. I'll tell you class, no injustice will be done to you. Listen to the class, you will be happy. Can do it. Okay, these are the basics. Anyone going from scratch? Some people ask, Madam Scratch? Tell me from where this is from. Scratch original radius of curvature From there, the center of curvature Let's start with the mirrors. The formulas we need First in spherical mirrors we have The desired formula is the mirror formula. We need to know this for sure. Mirror Everyone should know the formula by now. This is the mirror formula, so 1/A= 1/W/U Please don't be confused, Mirror. The lens comes with a plus in the formula. The formula comes with a minus. Mirror The lens comes with a plus in the formula. The formula comes with a minus. In this f u Do you all know what u means? Distance U is the object distance v is Image distance Where does the image form each time? So it will form on the screen. The screen distance is also the same. Image distance or screen distance Because real images are on the screen. So screen screen distance Anna Image Distance Anna Two are the same Even though it's real images, the screen Used. So don't get confused, F Focal. We know the length, but what is the actual height? Where does our formula start? I know the concept, but it's correct. The answer is not coming, where is it going? Why don't we get the correct answer? Where did the fat go? There is nothing that is not there, even if it is a big deal. But sign conventions Must apply Must be upline Sign ConventionsSign There should be a formula without conventions. There is no formula that does not use conventions. First Manasign Conventions for Formula One Apply.Sign Sign Conventions When applying, I usually I can give you a short cut table if possible. It will be easy to follow. One We have a concave mirror, the second one. There is a convex mirror. Focal length Object Distance Image Distance We have two types of images in the image. Real image and virtual image now Write it down and go. Concave mirror The focal length of the lens is negative convex. The focal length of the mirror is positive. What kind of nonsense is object distance? Without it, it is a concave mirror lens. Any convex mirror lens is fine. Object distance is always Negative When it comes to image distance, it If real, then negative, then virtual. The original real image in positive convex It does not form a convex form, but a real form. The image never lasts, everything is always virtual. This is positive. Let me just add one more small point here. Let me tell you a small point. After drawing the mirror, you can mirror After drawing the diagram, we will mirror it. Left side content left as usual All the points parameters that came from the side Also comes from the negative right side The parameters are all positive because they are Along the direction of incident ray There will be. So because when is our object Let's put it in front of the mirror. This is an incident. Ray So You Are Measuring Along The Direction Of incident ray so mirror ki right Everything on the side is also negative. They go to the left side of the mirror. Everything that exists goes into the positive. Even if you remember it like this, it's easy. It's over. Same is applied for lens. I think the same is true for Also Lens. If you stand like this even for the lens, it will be left. Everything on the side becomes negative. Everything on the right side is also positive. Will be. Whether it's a lens or a mirror This is the very easy shortcut to analysis. Okay so this is a good analysis mirror. What other formula do we have besides the formula? There are, which means there is one magnification. Magnification We have two types of magnification. One is lateral magnification and the other is Longitudinal magnification Lateral magnification Longitudinal Magnification First of All Why do you need magnification? Because We each have the nature of the image. He says. Object in front of concave mirror When placed in various places The image takes various forms. For how many? I remember revising it quickly. Make a concave mirror. When put in object infinity in Where does the image form fast? I have to say. Object in concave mirror Where is the image when placed at infinity? The form becomes the form near the image focus. Will it be remembered or object? If it were in infinity, all this would be mine now. I won't tell you because these are in the 10th grade. I forgot, they must have been beating me. Madam, there's nothing I can do. Okay object If you put it near infinity, the image will be in focus. The form becomes highly diminished real Inverted Object Beyond Center of If you add curvature, the image will be between and F form becomes Diminished Real Inverted Object Atsi Super Important object is that The image is also the same as when it was posted. This is what you forgot. Don't forget one thing, concave. Object Center of Curvature in Mirror Image is also off center when close Same size real near curvature What is in an inverted concave mirror? In the context a virtual image will form Tell me what is in a concave mirror. In the context a virtual image will form Tell us in the comment section. How many marks for what rank in EAMCET? The feeling comes, "I have already made a When I made the video, you Can't you see? I already made a video, Mom. I have zero knowledge on this chapter. Can I watch this lecture and solve? PY Q: Will it be enough for me? Watch Your Daily Live Series Varsha 3Q The user ID is enough to watch the daily live series. I don't have time, watch this video. That's what I said at the beginning of this video. See if you get confidence. I was just saying. Okay, rain please. Watch this video, okay, once laterally. What is the magnification like longitudinally? Look, I'll show you how it looks. First of all, lateral magnification means What's missing is this principal axis? Suppose this is my object. This causes an image to form somewhere. It will be. Let's assume this is an image, so height Height of the object of the image Then the formula for magnification is height. How tall is this comparison? How high is this compared to the object? What is the height of the image? Enlarge or reduce? Let's say it's the same size. So height of the Image / Height of the object is also Equal -v/ Remember the minus symbol because Sign conventions are applied everywhere. This is the formula for simple magnification. Madam, this is the longitudinal axis. Why is this called magnification? Look what happens in this. Our mirror in this is the principle. Axis Poll this time see the object This is my object AB, placed like this If is my object then its image Here the form is A dash B dash so like this This is how the word "elongation" has increased and decreased. It increased like this, it decreased like this. It decreased, it increased like this, it decreased like this. It is called ml because it is longitudinal. Let's write this as m squared as usual. Will be orb / u Whole Square Area It is common here to say that the area is taken. I hope it is the area that is taken. Running has been experiencing technical glitches lately. This is you on YouTube, coming up. It's not a big problem if you forget. Because what are we going to write here? See a dash -b dashb / a -b Its size What is the size of this? That's it. What is the size of this? We only write "got it" as long as it's the size. No, it means from here to here. Distance from here to here Distance, it comes here next. The distance from here to here is here. Distance from here to here You have to write it down. No matter how you write it, it doesn't matter. Got it, now in magnification. Why do we work so hard to achieve magnification? Need to know He gives in the Nature of the Image problem Depending on the magnification, you are the problem. It has to be done. So a little analysis Let me tell you, let's go for a small one. Analysis in Case of Magnification Magnification It should be understood in two ways. One Magnification is positive negative. He gave the second one without magnification. Magnification equal magnification Greater Danwa The two should be analyzed separately. It is positive then it is virtual. Image The image given to you is a virtual image. The image you were given is negative, but it's real. Image If I gave you a real image, you would be the one. You need to put a negative sign. You are Negative sign should be applied. Remember, Les Danvan is Then it is a diminished image. If it is equal to then the object size Equal to image size There is a greater Danva then it Enlarged image it is on Enlarged image for example. Let's take an example. Okay, example m = -3 m = -3 Madam -3 <1 -3 < 1 so - < 1 So what is the answer -3 < 1? Diminished image no minus separate You should watch 3 separate episodes. What is meant is that m is negative m. Is the Greater Danva 1tra a separate It should be seen as a negative separate from the other. Is a real real image ever Inverted And magnified The minus symbol should be seen as a separate number. This should be viewed separately, in magnification. Because of this in magnification Problems come to us for example. Let's look at a problem. Check out this concave mirror for face. Viewing has a focal length of 0.4 meters. First of all, what did he give you? Concave mirror So concave mirror Focal length -0.4 meters 4 meters Distance at which you should hold the Mirror from your face here is the face Remember the object is a face. Object C Your Image Upright With A The word magnification of five upright Where does virtual come from? Who will get the virtual upright? Virtual means magnification is positive so How much should you take Positive Five? Must be taken. What did you ask me yesterday? How much? He asked, "So in order to see your image?" No Face Viewing Focal Length The Distance At what point should you hold the mirror? Face is not so easy, how much should you find out? The distance between your face and the mirror How many faces does an object have? What is the distance between the mirror and the He asked what the object distance was. First of all, we know the formula. 1/a = 1/v+v/u But v is also an unknown quantity. That's why he gave you m, so here is m. What else can you take? -v/u So v = -5u Okay, you're here, in its place. The substitute is gone, direct. Formula - 0.4= 4= 1/ -5u That -1/u is the object distance of a square. How do you get a minus you? So this If you solve it, you will get the answer. Easy There are questions, so magnification like this So they are based Let's do this with magnification, but Let's discuss mirrors first. Let's not do it, so let's talk about magnification. Based problems are given to us in JE Mains. They come in the EFSET too, so this is one. Good concept magnification After the magnification is over, this Even in mirrors we have the speed of the Questions will come up about image next. What is the speed of the image? In spherical mirrors Speed ​​of the spherical mirrors Image So Speed ​​of the Image How First of all, you have to calculate. If we have an object moving, the image is moving. It will be. The object moves in two ways. There are chances that it will happen. So first of all Let's take this concave mirror. The principal axis is that on this I The object is here. Let us take this. Is my object so somewhere here somewhere? I guess I've got an image or not? It doesn't matter if it's a farm or not. An object can move in two ways. I'll show you the chances. One is my object. One can move sideways, the other can move upwards. So you can move it sideways. Movement means if an object This distance is less. Let's say the dash went with velocity. Definitely image this distance in the vi dash It goes with velocity. As usual here vo dash or / dt vo who object u u what Don't get confused by object distance. u What is object distance distance By time is velocity so what is du/dt? Velocity Off-object This is the velocity of the object and v is the velocity of the object. Dash means dv / dt why v is the image Distance Image Distance by Time is Nothing But Velocity Off image This is how the object moves, right? It will move in this direction. So I am this Let's take the formula 1/f = 1/v + 1/u 1/v+ Differentiate both sides of 1/u The focal length remains constant. The focal length does not change unless the mirror changes. The focal length does not change as long as the mirror changes. Focal length constant constant of Differentiation of Zero Constant Differentiation is zero so you do this. If you differentiate, the answer is this Differentiation -1/Vask dv/ dtp -1/usk dv/ dt = 0 so you can calculate its sum If you make arrangements, you will get an answer. What happens dv/ dt dt = - v/uholskr du/ dt super important formula for you Mathematics only comes with differentiation. This problem only arises when differentiation occurs. You can do problems on it. You have to Be good at your differentiation. The Yuva Formula in Differentiation Okay, you guys, you need to learn all the formulas. Formula is everything. I want to learn. dv/ dt = t This is the formula when the object Image towards the mirror towards the Mirror or Perpendicular to Mirror Now you can say it in another way. The object image is moving. Another In other words, in this direction, in this direction. The object moves like this in So the word moves up and down like this. Who is being weird here, I mean DH? It varies, doesn't it, height varies? It will be different depending on the height. What should I take here? dho dt also dhāi/ What is the best formula for this for me? hi/ho = -th/ u Now you do this. It's enough to differentiate, right? Differentiating Up and Down Differentiate the numerator and denominator. Do it this way, so from here. Direct me dh/ dt = -v/u * dh/ dt It will come directly. So take care of the formula, that body. How does the body move along? Will the principal axis move? Perpendicular to principal axis Will these two move a little more carefully? If we look in the mirrors, we have questions. Just like that, in the mirrors. Let's take a look at the graphs, Sum Basic. Graphs Basic graphs consist of two types: one Biwa/ U graph 1/th/th Graph 1/th here 1/ u graph this one Secondly, we have a graph of the This is you, this is how it looks on the graph. If you draw a line, this represents Because of the plane mirror Radius of curvature for a plane mirror Does a plane mirror know infinity? The radius of curvature will be infinity. Okay, so how does a real image form? This is the graph for real image and This is the graph for virtual image. That means this is convex and this is concave. It can be said, but the real image is virtual. The image will be correct next time. This is a real image, even though it comes to this. There will be a negative slope with 45 degrees. And this is a virtual image. That's what a virtual image graph is. This too Makes a 45 degree. You are here. If we get to the intercept, this becomes -1/a. This will be positive 1/a. So these two Memorize the graphs a little. Enough, no more problems needed. Let's go inside. If I miss anything, I will tell you about the problems. Carby Overtake another car at a relative Speed ​​of 40 meters per second 40 meters Whose speed per second is the car's speed? So Given What is the velocity of the car at 40 meters? Persecution Okay How Fast Will the Image of Carby appeared so what should I do with this? The object to be taken here is Carby. Object to me If you observe here once Carby is an object for me. Works. So I call this duya / dt. I will consider now the image of Image asking what the velocity is. Velocity dv/ dt is confusing to many people. It turns out that dv/dt is acceleration, right? In kinematics, dv/dt is the image Speed ​​dv/ dt Image speed move in the Mirror of focal length 10cm fitted To a car and a car and a car is 1.9Measuring meats away from a car. Who is the object? So who has the mirror and who has the car? There is. So the mirror is in the middle of the object. What is the object we take as distance? Distance 1.9 meters Here we observe a small point. The focal length should be 10 centimeters. It is 1.9 meters. Meters and centimeters are not matching so What should I do with this 0.1 1 meters because The answer is in meters per second. So The correct method is to convert to meters. Okay, that's fine, I need dv/dt. I know the formula dv/ dt = - v/uholes * du/ dt du/ dt know u know still need v v It depends on where it comes from. The information given is 1/a= 1/th. This is what mirrors are, what we do is 1/th+th/u 1/F What does this mean? It fits the car. Definitely a convex mirror mom's car Mirrors are always convex. Mirrors Convex Mirror Focal Length Positive so 1.9 = 1/bup 1/-1.9 Because object distance is always Negative object distance is always Negative so 1/th= 1/1.9 9chi focal length 0.1 sorry focal What is the focal length of the lens? 0.1 1/0.1PW/P1/1.9 Solve this and find out here. Substitute v=b. = It is 10/19 If written as 10, then 1PW/19 So 20/19 So v how much did you get 19/200 20 19/200 Substitute it here so dv/ dt = - v 19/200 * 200 * u how much is u 1.9 9hole Square * 40 Solve this, one zero is missing. 19 40/20* 20 40/20* 20 2= 4 2 10 0.1st answer option A Next, we've already done this. Next is a convex lens problem. Look over the lens mirror combination. Look at the real problem: a blow to psychology This is Annamatavan, meaning to hit. The Fourteenth Century Ray Optics Lens Mirror Over Lines Combination I won't do it, Skip, shall we? It should be done because every once in a while Even small hero movies are like a dud. Movies come and become hits like that. So, there are nine lines, right? Don't skip, you have to do the problem. Okay So first of all this is a lens mirror. Combination so after saying lens Tell me now, tell me now, lens After saying that, tell me now. I'm telling you because there's a concept in this. Look what he gave me. Convex lens. Its focal length is concave mirror e. He placed both at a distance of 80 cm. He said, "So I have a lens for this." Focal length 20 centimeters From this 80 80 centimeters 80 centimeters A concave mirror in the distance Put Its focal length The focal length of a concave mirror is Not given Concave mirror is to the right Of the convex lens is okay when the The object is kept at a distance. How much is an object of 30 meters? He put it at a distance of 30 centimeters. He placed this object in the distance. Left of the lens image here Look carefully at the question. It's an image. Remains at the same position even if the Concave mirror is removed concave Even if the mirror is removed, the image remains there. Will be after point number one What did the question ask the maxim? Distance of the object for witch This concave mirror by itself is wood. The virtual image produced is a concave When does a mirror produce a virtual image? This concept will produce for you Need to know. So this is a pure concept. Formula application gives you the concept You need to know the formulas, apply both. Must do. What is the concept of in case? Off Concave mirror When will the virtual image form? That is, the Venn object This is between f and o optical center. If not, then the focus is on the center of the pole. When virtual Image It will be a farm. Now, what did he say in the question? How much is that? Maxim is the object. What is the maximum distance you can carry it? If you put it near the mirror, I will This virtual image will definitely form. So the max distance The Max Distance for Virtual Image That would be the focal length. What is the maximum focal distance? Length means you are concave now. Find the focal length of the mirror. Must be out. Next Why this? It means to be near the same position as given. Wherever the object is, there you have it. The image should also come, where is the radius of it? Near the curvature means because the center of If you put this object near the curvature, again The image should be near the center of curvature. Now, let's move the object to the concave mirror. Who gives this lens? Now the concept is that because of the lens The formed image of a concave mirror So first it works like an object. Find the image formed by the lens. Let's get out. So first, what is the formula? Remember the formula for the lens you should use/v -th/u This is the lens formula in the case of a lens 1/a = 1/v - 1/u Focal length of convex lens Length will be positive. 1/th We find Must be out. 1/ -30 Because object Distance is always negative so 1/th= 1/10 common subtracted from 1/2-1/3 So how much did you get? Answer = 60 The centimeter positive came in at 60 centimeters. That means you are 60 meters from the lens. An image formed in the distance. What is the size of this image for a concave mirror? Distance is 80 - 60 20 cm In the distance, now in question What did he say about the image that was formed there? It works like an object so I Here again the final image is the form It will be. The farm should be in the same place. What do you want now that you've become so successful? I understand for mirror. For mirror Y = Radius of curvature 20cm radius When the curvature of the spine is 20 centimeters Focal length 10 centimeters, that's also left. There is a side, so -10 is in the butt problem. Not given so no need to take the negative. If you give it in sign problem, we will take it. If you don't give it, you don't have to take it. This problem Except it feels awkward to watch. It's a very easy problem, got it. Next If the Distance Between Object and it's times magnified Have you seen the virtual image? Times Magnified Virtual Image So Write down the given information. Magnification Two times virtual means positive. What you need to know is produced by The curved mirror is 15 centimeters away. Between Object and Its Virtual Image object and image object= 15 centimeters What is the focal length of the mirror? What should be the focal length? Basic What is analysis positive negative? Basic analysis that can be eliminated Positive can eliminate negative. Look at the mirror, what did Bikaz give you? How is m Greaterdanva m Positive There is a virtual magnified virtual Magnified form becomes dead. Convex mirror is not convex. Never a diminished virtual image Remember that the form will be Convex is always diminished. A virtual image will form. That means this Concave mirror Concave mirror focal Length is negative so positive is eliminated. The answer is not positive, it is negative. The answer comes, "Got it," so the rest is up to you. Proceed as follows: m = 2 = -v/u sova = -2nd= -2 Substitute here here If you substitute U - 2 = 15 centimeters But you have a negative sign again. We should keep it negative here too. A negative sign should be put here. Should be put Anyway, we have to put a negative here. I have to put a negative here, so here. If you put it in negative, it will come out like this. Then Japtaya 3 comes 3= 15 so Be careful, you are here. Should I put a negative sign or something like that? We need to put a negative sign, so u = -5, right? 3 -5 centimeters What focal length do I need? What else is there in U Place? How much is the distance between the two +10 centimeters? Here comes the 10 centimeters formula Put it away, it's a mirror. 1/vpv/u Formula Direct Substitution It's Very Easy Question Next An object placed a distance away 100cm in front of concave Mirror so it is 100 centimeters. What is the object distance given to us? 100 centimeters radius of curvature 200 meters Okay, so the focal length is also 100. Centimeters are very good. The object is shown in the figure. Starts moving towards the mirror At a speed of 2 centimeters per All seconds are in centimeters. No need to change the kinematics here. Ray optics combined with Ichadamma motion in Straight line ray optics combined So whoever is in motion, Those who left the line are a bit basic. Not big, not small, basic, very small Basic Okay let's see the object is here But it doesn't rest there permanently. What happens at 2 centimeters per second? The object runs at speed. Towards the Mirror The Position of the Where does the image from the mirror come from? Mirror after 10 seconds 2 centimeters every second Runs. How many in 10 seconds? Centimeters run there for me. Image position is required. That means I have there I need to know the object position so I first What you need to know is that you are the first to find out. What to do is find you later. 10 seconds Object after 10 seconds You are the image from where you are. Distance is needed. So how is that? It seems simple to me every second. It runs 2 centimeters per 10 How many centimeters in seconds? Runs 20 centimeters obviously This is from So 100, which ran Run, run I got a dash, how much is 20 centimeters? Ran means now the object How much distance should be taken? 80 centimeters So you say this is the correct value. Now dash = 80cm If the focal length is 100 f, then look at this It is concave so it should be minus. Object distance is also negative. Now what is v? So the formula is 1/f = 1/v+ 1/u. 1/ f in place of -1/1/v -1/80 This should be solved as 1/v= 1/80-1 Solve 1/ 100 v value It will come. That is how you need to solve the problem. Is it easy or difficult? How is it? Answer 400 Toxic Boy Very Good It doesn't matter if you do the calculation. Danger if you answer. Please respond mam JE ki Arihant Is that enough? Arihant has many books, Arihant. What is not enough, just one Arihat book? I don't know if I'm ready for JE. How Much Are You Confident Problems Can you do it yourself or is that up to you? Readiness is the end game. I won't tell you the capacitance because it was just yesterday. Recently, capacitance in HVS I said. Did you get the answer 400? Solve it now. You can save from here, okay? So that's before going into refraction. This is what mom does in the mirrors. If it comes to us, we will do it. Now we will move on to refraction. In refraction we have two Refraction at Plane Surfaces Refraction at Curved Surfaces Got It So refraction from a plane surface Let's first see what refraction is. We need to understand all refraction. When does refraction occur? Refraction alone gives you one point. Remember the refractive index. Refraction is based on this. When does refraction occur? Light Travels From Medium one to medium T It Bends At the surface of both the medium and the bending What do we call off light? Refraction Let's say the bending of light is two. This happens in different ways, we are sure. You should know this is medium one and this Let's say this is the medium and Let's draw a normal. We draw a normal for everything. It will be compulsory now. Is everything gone? An incident happened like this. Incident Ray, this is actually like this I have to go but what will happen if I bend? It will be a trip. When is this rare? Medium and this is a denser medium This is the same situation then. Dense medium and this is rarer medium. And this is my normal, this is my Incident Ray Incident Ray Actual It should go like this, but this time bend like this. It will be. See the difference between this and this. Here is the normal bend towards Here it is a departure from the normal bend. What is the reason for the change in speed? Light in rarer medium Dense in medium Compared to speed in denser medium Off light decreases. The speed of light is higher in rarer mediums. There will be. Speed ​​off in denser medium The light is low. In rare medium The speed of light is high. Point number one before I proceed How many people know, check it out. What is this, what Light In vacuum R Airwa Anyway, I hope it is going on. Speed ​​of light In any medium Next, what is the value of 3* 10 to the power? 8 meters per second This does not change in vacuum. Air is standard but v value The medium changes, the value changes. It changes. The value doesn't change, okay, so now on to this. Let's discuss this a little bit. Important point you mirrors I'll leave it, Mom. It's okay. Just leave it. Refraction is not possible under any circumstances. No one should give up refraction. Don't go to the exam without doing it. It is This refraction is what saves you, Savior. Parte, I'll make this as easy as I can for you. I will say it like this, to put it mildly. I You did as you were told. Even if you study, you will fail in the exam. I can do it in 15 minutes 20. Take a few minutes, 20 minutes. Listen with concentration. Enough, you. You can do problems, but not maths. A little bit of geometry in trigonometry Rawalin θeta cos θtan θaluson 90 - θSun 90p θ If you know something like this, it's enough Problems will go away, so concentrate. Listen for 20 minutes without getting distracted. Listen, we're talking about the word refraction. We are discussing that too. Especially Refraction Through Glass Lab This is what we are going to learn now. Why is there bending in the topic refraction? I said it would happen, I'm okay. Why does bending occur? There is one important point, the same Snells Law Snell's Law is super duper important. Remember me. You remember something, anything. Forget it, no problem, but you're like snails. Refractories for any problem If you don't come, go first to Snell's. Snell's Law Will Give You a Solution for Most of the problems are so similar to Snell's Law. Snell's Law Refraction Snell's Law First, you have an idea about Snell's Law. It should come. Problem in refraction It appears that Snell's Law should be applied. Okay, so snails, I thought I'd come. What happens in law is that you have a The medium has its refractive index There is one second medium, its refractive index. Index This is a different medium This is a different We have a normal for both of these mediums. Let's draw an incident we all know. Ray comes like this, this is actually like this I had to go but I got bent and went like this. Towards the Separation Towards the Incident Away normal next this is the angle of This represents the incidence. Represents the angle of refraction. Does. What does Nels say? Be careful wherever there is an incident. Look, wherever the incident is, it's there. The most important thing is to be alert when an incident occurs. The angle of incidence is there. It will be. μ1 μ1 i that is your coordinates. Annamata Mon1 sin i = μ2 sinA You shouldn't apply this formula just because you fall. Angle of incidence means incident Where the ray is, there is its refractive Now multiply the index by this. I posed the question like this. Same Mu2 Muva and Normal This time the incident happened like this This is how the angle of bend went off. Incidence How is the Age of Reflection now? You should write from wherever you are. Just take the refractive index. Music is not a calculation, it is not a calculation. Where I is, it is the refractive index. I need to sign with you so here I am in Mu2. There is, therefore 2 2SunI = 1SunA I hope you know how to write Snell's Law. An idea has come to mind. How about Snell's Law? What should I write? Wherever there is an I, its Mu should be taken. Wherever there is R, there is Mu next to it. It has to be written, but muon is a number. No, remember this well, Snells. This is what happens when you have so many problems in You will apply, so remember. Any problem with refraction Did you see the first array of snails? Tell your mind to use it like a snail. Point number one is the second one. Now once the refractive index Let's talk about that too. Refractive index Mo RA Symbolizes. It is that. Dimensionless units-less quantity It has no units. The condition in this What is the Ven Light Travels platform? From Wen Light Travels Air or vacuum To any medium Anything from light air or vacuum When traveling to medium and another This is light traveling from medium to Medium light traveling frame Medium One To medium Look carefully from where to where. Travel will be from light medium one Traveling to Medium 2 is okay once. Let's see. This is what we call absolute refractive. The index is called the absolute name. Refractive index is defined as What does it mean to say that? It has already been said that Definition But what do we know? Know that v = f when the frequency is Constant so v is directly proportional You are here to observe. What to do is inversely proportional. To vc is constant, c value is 3* 10 Power 8 is a constant som is inversely Proportional to v Directly Proportional to Lda Somu is inversely proportional to Lda So you are here in the formula 1/2. = v2/v1=d2/l2 All of this is also analysis. Various types of analysis are all in this lesson. Only the wave is not useful. In the lesson on waves in the lesson on optics Useful everywhere. So this is one. Watch carefully. So absolute Refractive index is the ratio of air to water. Light to medium between vacuum and light Just like when you left from the air Air to glass went into the lens What can you use that went into the lab? But look what's happening here. Here is Medium One and Medium Light. Traveling from Medium One to Medium One Where is the incident ray in this? Tell me what the incident is about. Are you in Medium One or Medium Two? Tell me about the incident in Medium One. Is it available in medium size? Is the incident in Medium One? Is it in What medium does refraction occur in? Did refraction occur in Medium One? Did refraction happen? Where did this happen? This is a very important incident for us. Medium one is in because light medium Went from one to medium 2. So The incident ray is in medium one. Where did refraction happen in Medium 2? So how do you write this? Annamata Somu2 / Mu1 This is not it either You count this. Actually, it is written as mu relative. Relative refractive index Absolute refractive index Relative refractive comparison ala Under no circumstances when writing Don't get confused, in which medium? In which medium did refraction occur? Refraction has occurred, it comes up. Here refraction occurred in medium 2. Refraction in Soma2/Ma1 Medium 2 So the formula μ2 /μ1 is Remember, I am on this. I'll tell you the application, didn't I? It's a 20. Just listen for a few minutes, that's all, okay, that's me. Now this I think I changed it. I went from Medium 2 to Medium 1. Let's write Medium 2 to Medium One this time. What happened in refraction medium one? Refraction occurred in So Mu Relative How to write M/M2 in Medium One Refraction occurred. Why did refraction occur? You should write this down, whatever happened. Relative refractive index relative The refractive index is very Important, Mom, this is from here. Remember, from here we go. We will enter the glass slab and end up glass. The slab and its stories are its siblings. My sister said we will learn everything. What is the real story behind the glass slab? Let's do it. What happens in a glass slab? Let's say this is our glass slab. Glass An incident occurred on the slab. This is my incident so I am a I drew a normal angle. This is a normal angle. Of incidence is This is mine Angle of incidence is what should it be? This is how it should go. But what happens? It will bend so this is my angle. What happens here is the refraction of Has air become denser than glass? What happens the second time? It's too late. You will also get a rarer one. Note: Air to glass, glass to Okay, let's stop here. Let's stop here for now. Refractive index Of air and and this is the mew of glass Now how do I write mu relative? How to write mu relative exactly mu Of glass by the way, of air to us I know Moo of AirOne so here is Moo What happens to the relative? Simply mute it. The glass will run out. Mu of Glass It will be. I think that's what I put here. So if I put refraction here, it's 1/moon. It will be. If I put refraction here 1/It's a point to be noted, okay. So remember this well next time. We are going to Glass Lab applications. What is the most important thing in glass lab? What happens is that we shift normally. Objects in one place when viewed Appear. Glass with a thickness of one I think I blocked the lab. The eye then definitely saw what was there. The object appears in a different place. This is what we call a shift. In the glass lab There are two types of main shift and mother shift. There will be a shift so once heading I will shift. In position Off-object A shift in object position is visible. We have two types of it, one Lateral shift is the second normal shift. One word is lateral shift. R Okay That Let's start with the first lateral shift. What is lateral shift, Mom? I'll tell you. Let me tell you what a lateral shift is. No, I have a glass slab like this. Okay, there is a glass slab, it is called glass. Let's say Lab is this my glass? A line like this for the slab glass lab Let's say it goes. What I did was, here's an object. I will take that object from here. I'm trying to see through this. Glass slab From inside this glass slab I am trying to see this object. I'm doing Let's talk. The thickness of the glass is Refractive Index of the Glass Lab The object must be here now. I don't see what's going on here. Observe once from here. Incident Ray started It will bend and it will bend again, right? Twice once inwards once Away from the normal, our eyes are always Our eyes never see a bent ray of light. Where does the straight line look? Looks. That's why the setting sun is the setting sun. He will be set someday, but we still have An image will be visible there. Virtual Image So Our Eye Is Always Bent The light ray does not see that light straight. Where does it come from? From here. What does our eye do? Oh, this light is here. "Are you coming from here, boy?" she said. You have an object that needs to be here. What is visible to the eye is not visible here. It appears here so this is your shift. This is what DeltaA is all about. So this is your delta A, this is the delta A formula. The formula for this deltaA is t * 1-1/m. Bikazmoo1 air kada mu airone It went from air to glass. So where is the refraction by one by one? What happened in the air was refraction. This happened on air, so it's a one-time thing. One of the favorite formulas of AT&T has some favorite concepts Did I mention that vector form is This lateral is like the law of reflection. Shifts are normal shifts. These are very Important, Dad, this is super. Important okay this is lateral indaka It hits from the side, it's not lateral. Normal shift sorry Normal shift to the plane It went perpendicular, didn't it? So this This is normal shift. This is normal. What is shift and lateral shift like, mom? Let me tell you, let's talk about it. What is lateral shift in glass lab? Glass slab is also super important. Lateral shift is also very What is important in lateral shift? This is how it happens. What is an incident in lateral shift? Ray First of all I better take Okay, let's have an incident like this. Let's consider this my incident. What should actually happen with this incident? It's a pity it has to go like this. If you If the glass slab is not an obstacle, Incident Ray should go away like this, right? If correct, the incident is like this. It has to go, but what does it do? Let's draw normal. So what does it do? It will bend so first of all bends. Towards the Normal, what's going on here again? What happens is that the glass is exposed to air. It comes, so bends away, how? It will bend, it will go like This is the finale for you, it will come out like this. Emergent Ray Annamata This is mine Emergent Ray is actually like this The glass lab is where I need to go. This is how it came out. So how many shifts? This means that this much shift has happened. Deltax lateral shifted sideways, right? So the lateral side has shifted. For this too if t is thickness of Glass lab is refractive Index of Glass Lab Formula Delta = t * sin i - r/ cos r and Deltax = i * 1 - 1/mu This formula Again A Most Favorite Formula NTA Most favorite refractive index in All are my favorites but this is very me. I have said this many times in the past. Forget the derivation, memorize the formula. Do the formula very very very much Important to memorize I have told you many times about this. There are a lot of problems with this. Let's do it. Let's do it anyway, let's do problems, this is a Another kind of shift in glass lap There is a shift in apparent depth. Before going into depth, there is something A very important concept I'll tell you, see. Small concept Small concept but important Same tapakaya means same tapakaya. It may be small, but it's worth it if it explodes. The word "pelt" means "to blow" What is an optical path? Have you ever heard of this name optical path? This is also called DeltaX. Optical Have you heard the name Path anywhere? Those who do optics have an optical path. Have you heard about this name? Have you ever heard of optical path? Have you heard of the name optical path? The optical path is a good interesting The concept is also that we We will take the glass lab. Okay, the concept here is vacuum. In A light ray Let's say Tubi travels with At what speed does a light ray travel in a vacuum? It travels at the speed of a light ray. Okay, light ray with vacuum loss speed. The light ray went for a quarter to one. Gone. We know the thickness of this. Its thickness is normal and it is called d. Let's take the thickness time t. So you'll get confused. Let's take the thickness d. Now the question That is, its refractive index is mu If you lose vacuum and go at speed, the glass The lab is going at a low speed here. Meaning of the term optical path length What if in what time? How much time? You have a ray of light coming from a glass slab. Vacuum at the same time as it went correctly. How much distance does it travel in? Here, the time is maintained the same. How much distance in a vacuum in time? We optically do what travel does. It is called path length. How much time in this? Traveled while in a vacuum How far does it travel? Here I have Delta = Distance = Velocity * Time Distance = Velocity E Time c * Again this time this time is the same this time This time is the same as time equals distance. Traveled by velocity so time is Distance Traveled by Velocity Manaki We know that m = c/v so deltax = m. * d is the optical path length, which we We have already used it in wave optics. You Someone told me about wave optics. Class is a glass with a thick glass. When the slab is introduced Fringe in the YDSC experiment There is a concept called shift that fringes We already used Mu ED during the shift. So remember in a vacuum d If you travel a distance, go medium. The distance goes a long way in medium. Distance should be multiplied by mu. Multiply the distance in the medium by mu. I have a problem for you on this. Let me show you a problem in 2019. This problem has come up once, look at it. Ray of Light in Vacuum Is there an incident on a vacuum? What is a glass slab? What is a glass slab? On Angle 60° Angle of Incidence 60° refracted at an angle along ob Yes, it's shown in the figure. It's glass, it's vacuum, it's glass. Optical path length of light ray tube How much did he say? A A to B optical Path length so here is this optical path If the length deltaA is AO It's fine for you to have it in a vacuum, but Obi came into the medium so mu Times of O Remember, this is the model I've ever seen. Those who said they didn't do it, this model is definitely Remember because most of the You should also do those problems in 2019 and 2020. Those models can be repeated. This is a good The model is the same as it is, so the question arises. I wouldn't say that, but if this model is made Learn Optical Path Length The normal path length in a vacuum is Multiply with Mu in medium and The formula is over, so you need an AO. Look what he gave you here, what is this, you know? You need this, look at this triangle. 60° but this is 30° What should be taken as the opposite hypotenuse? 30° sin 30 = a/a So ao = 2a set aside and then what else I want to be obba. What does this mean? Take the triangle because it is a triangle. So this is also adjacent. Hypotenuse adjacent to hypotenuse means I should take cos 30 as adjacent. What should we take as the hypotenuse? 30° = b/ ob cos b = cos 30 3/2 so ob 3/2 is b But substitute here oa how much 2a + 2b / 3 in place of *ob But You are not here, you are in the options. No, how else will Mu find out? Now tell me in the comments how Will you find out about me now? Please be clear in the comments, Mu. How to find out what the first thought was How to find out if Mu is coming first? What should come to mind? Vinay Reddy Yes, I can bring it to you, try hard. Do it. You can try hard and get it. So what is the answer? Remember what? Come first, come What to remember Snells Law Snells I told you, whatever you want, whatever you don't want. Very good Lalitadevi Super Snells Law We must go closer and closer. Where is What Does Snell's Law Say? First Incident Ray Where is the Incident Ray is here. This is an air or vacuum cleaner. Isan Don't wear 30, wear 60. Sign 60 Degrees Because Angle of Incidence You need Musain later. What is the refraction 30° Sosan 60 3/2 = Moo * How much did you get for 1/2 a som? 3 So if we substitute 3 here 3 3 Consol So Final Answer How much is it for me Got 2a+2b This is the final answer. Answer 2a+ 2b is the Have you seen the answer to apply something like this? We have this concept of an optical path. All of these also need to be applied. So What have we seen so far? Shifts of all kinds. This is a type of shift, this is shifts. Another type of shift optical path Next, another very important thing. Apparent depth is the apparent depth of Listen to the super important concept Listen carefully, parent. Depth Here again we have two cases. Let's take case one. Object In denser medium Observer In rarer medium The second case of the observer in a rare medium We will take the opposite of this correctly. So the cast object observer changes. When it comes to caste, the observer In denser medium object in rarer Medium: There is a big difference between these two. Simple difference is we are walking on water. When I saw that bottom was raised up It looks like it's the same application. So this is our medium in this. That medium one Wouldn't it be better if it was written more densely? Dense medium and this is rarer medium so Where is my object? Object It's definitely in the denser medium, this is mine. Object So First of All Normal If you draw a light ray along the Normal without refraction The second light ray goes here. The incident occurred, normal bends away. Extend it back from the normal If I do, it's like I have an object here. It appears. This is the original position of The object but if I place it here Where does the observer see? The object appears to be here. So how do we write this? This is x Real This is real depth This is real depth But what is this apparent depth? This is the apparent depth and this is the shift. How much has shifted from here to here? It's shifted, isn't it? How much has it shifted? These are the questions he asks us. So First of all x apparent equal x real / If the word "mu" is not relative, then it is relative. One of them is air and the other is different. There will be medium. So this is point number. One, we need a shift. What is x shift shift in this? If you subtract this from it, you get a shift. So How does the shift come about? x real minus x What is the apparent meaning of the two? If you write, you will remove the real common. 1st/2nd This is the formula for x shift. Okay, this is also a good formula. Remember, we have one of these. What is the application? That is Multiple slabs This is something we ask ourselves every year. Even on 26th also in the January session In a session on multiple slabs The question arises, guarantee multiple Question about guarantee on slabs Will you come? Multiple slabs are Very easy to understand. We have a variety of materials in this. For example, its total height is H. Let's say. No, it also means this. Can be done for x1 distance too1 Filled with material. Next The distance x2 is the thickness x2. Thickness2 Filled with material called Next x3 Fill with a material called Thickness Moo3. Done. Now here is a coin for you. Placed this is your object. Looking from above, what is the apparent race? How much of an apparent shift is this? Come on, it's a very simple question x Apparent = A1/Moo1p x2/m2p x3/m3 It's a simple application but in January This model is coming, take care. Even if you ask for a shift, it's the same shift. He asked Soshift, it's that simple x Real * 1-1/W1 x real means x1 right? Sorry here. Here x1 comes to x1* 1-1/m1 + x2* 1-1/2 + x3* 1-1/m3 And so on Easy to Understand How are these model questions? I need to identify it, that's what I'll tell you. Let me show you. Look at this, a vessel of depth 2ha is Half filled with liquid Refractive index 2 2 Upper half With another liquid of refractive What is the height given by the index R2? He gave a total of 2H height, half of which That is, how much height H is filled with 2 2? Fill another half-height with root liquid. What is the liquid? The Impassable Apparent Depth of the Inner Surface of the Bottom of the Vessel Direct Formula Substitution So x Apparent Equal/ 2P/2 2 Soha/R 2 Common Takes I am a plus/2 3/2 comes, not in the option, check. Make 3/2 3/4 So convert it very simple e 2 It's there, so simply do 2/2. The answer is 3/4. 2 So definitely check out this model. Next Wave will move on in the glass lab Let's move on to the second application. What is here, Observer in Dense Medium? There is an object rarer medium just This has a reverse, so we Let's go to the direct formula here. But here we have taken x so here Let's take y apparent, y apparent = th Real *moo Also shifty Shift = left -th *th Real no matter how we write it, so These are related to apparent depth. You can only do this regarding the glass slab. I've learned enough, what more do I need? Much is enough for glass lab but in this You are absolutely right about everything I said. Apart from these, there is more that you should have learned. What happens in the glass lab is lost. But not least, everyone's favorite topic. Total Internal Reflection for all of you Favorite topic is critical angle. And Total Internal Reflection TIR Don't ask what that means, Total. Internal reflection is first of all this. To happen means that certain conditions must be satisfied. The first and foremost condition is to be What must and should happen here? That is Light Love to travel From Dense medium To rarer medium Light has to travel from denser medium. To rarer medium otherwise total This is the point where internal reflection does not occur. Number one to note condition for critical Angle Dooring What happens at the critical angle? Critical Angle First of all critical What is an angle? θC IC is a name for something. θC IC All critical angles are Representative critical angle so The critical angle doesn't matter. Precisely during critical angle This is what happens at the critical angle. Dense Medium This is rarer Medium Light Definitely denser to rarer in medium Go to medium. While going like that If your angle of incidence is Equal to critical angle then Refracted Ray Exactly Along Surface That means it goes. The value equals 90 grams. So Remember that when I = θC Will B 90° This is the problem, everyone. What do you think? This is a concept. I am the problem. I'll do it later, no, this is your problem. This is your problem-solving technique. The problem is this, what is your problem? I understand the concept completely, Amma. Now I'll make problems. Many parents have the wrong approach. They have a very wrong approach. Even parents don't understand children. Listening to classes for hours and hours Why can't you do the problems? Why is Marx not coming? The reason is wrong. Approach physics never The concept is different, the whole concept is the whole. After learning, I sat down. I will cause problems, you are very wrong. The problem is your concept. Every concept is a problem, mother. So with that intention, that is, with that approach, you If the class doesn't listen 90% of children are now listeners. How can you be like that? This is not a concept. When Madam has problems, I I will solve these problems, father. Problems should arise from the concept itself. The concept is different, the formulas are different. The problems are not separate, they are all the same. Remember all three are the same. This is what is meant by critical angle. What happens now is total internal Let's go to reflection, total internal. Reflection Total Internal Reflection What happens in Total Sure Internal reflection should happen, which means Yangil. Of incidence must be greater than Critical Angle Point Number One The angle of incidence must be greater. After that critical year, another Relationship If θC is c = MooA /Madi I, then this formula is I would like to remind you that some people The formula is written as 1/moo. But when should it be used? When rarer is medium. This is Air or vacuum When the rarer medium is air then It should be used only but in a medium You can move from one medium to another. This is what I am now when I leave. I tell you to learn, RD Ramadevika RD Remember that θC = mu Rarer Medium / Mu Denser Medium Mu Rarer / Mu Denser is exactly like this Must be mu rarer / mu denser clear Remember that Sun θC = MUA /Moody All of these things should be combined to create problems. Let me show you a problem with this. Before we get to the problems, one more small thing. Application, please. What is a small application? Which lens? Museum of Refractive Index Is placed In the air this is point number one o We haven't even gotten to the lens yet, have we? Sorry We haven't gone near the lens yet, so It's not about the lens now. So, when you say it, you get into problems. Let's go. Okay, let's do the problems. This is over, next is this problem. See a ray of light is incident at On angle of incident 60° on a Glass Lab of Refractive Index Root After Refraction Light Ray Emers Out of another parallel face lateral What shift do you have to hold? Lateral shift, okay, you first. The lateral shift is now to be grasped. Write down the given information. Angle of incidence 60° Glass Lab Refractive IndexMoo2 = 3 Who is the third from Air Air? It goes after refraction emerges out. See the lateral shift value given. DeltaA= 4 3 The thickness of the glass How much is the lab, is there a direct formula? Substitution Direct formula substitution in this We don't even want Mu1 or Mu2. This is it. This will be Mu. What is the formula? Remember or not? DeltaA = tI * 1-1/moo How much direct formula substitution Look, you need to find out t from here. 4 3 = 60° it * 1-1/ 3 Madam, I don't remember this formula. You were asked to memorize a formula. DeltaA = t * sin i -a / cos r me I remember this, do both and that value. You didn't give it to me, so you use it like snails. Apply Snell's Law according to Snell's Law According to Snell's law, which one comes first? Air is on the air so first. 1 * sin 60° = then into the glass So find out 3 sin r. Sine sin 60 3/2 so what is the value of r? I got 30° Khatam Kahani, all of it here. Substitute, I know this. Another easy method is DeltaA 4 3 for you. Don't know sin 60 - 30 / cos 30 Isn't this easy? 30/ka 30 tan 30 so tan 30 what is the value 1/ 3 comes here 4th m 12 what is the answer It's 12 12 centimeters. See Centimeters Meters Answer 12 See how easy it is if you know the formula? It's over, look at this area of ​​laser. Write the information given of wavelength. Given Why did he give the wavelength as 630 nm? Incident at an angle of 30° at Diamond Air Interface I = 30°I = 30° It is going from diamond to Air is denser to rarer refractive. Index of Diamond Air gave Chus the The correct option is first of all for you. Light is denser when it is denser to rarer. If you go to the ER, you are critical. Angle Total Internal Reflection It should come into the mind, so according to that If you check, θc c = moo reror /Moo Denser Moo Reserve Denser 2.42 sin on θc If you observe once, how much is i 30°? What is the value of sin i? 1/2 means 1/2. 0.5 This is less than 0.5 5 for you. What did you observe here? Whatever your angle of incidence is It is greater than the critical angle. When did this happen, total internal Reflection Takes Place Total Internal Reflection Takes Place That means light ray refraction actually occurs. This can't happen, can it? Light rays can't refract. Diamond This is how the air light ray went. Greater Than θC So it's back again No refraction occurred, reflection occurred. So refraction is not possible. Refraction is not possible. Next, we've already done this. See this problem Highly Repeated Model Look at the same model that came out in 2025. You Same model question when 2019 same You will get the answer to the same question. It is there that he gave the numbers here. No numbers were given, that's the difference. This is a question, mother, so look at the questions. R repeated now you do this If you want to do analysis, you need a light ray here. Entered from This incident is here Theta angle is given by mu=th He gave the next light ray and it went like this And if it's gone like this, how much is it here? 90 degrees is definitely the critical angle. It will be equal. He gave 1.25, look at that simple statement. This is a very very simple concept. Once you observe, you will get this. The angle is 90° so this is 90 minus theta. It happened. Apply Snell's law and find the value of θ. Can be out. What did he ask in the question? See Incident Angle θ as shown in Figure what is the maximum value of θ For Witch Light Suffers Total Internal Reflection θ is required. What does it mean to want θeta? Now my concentration will be here. Look at Snell's Law Direct Snell's If you apply the law, you're done with snails. Lamu1st Isan θ =Moon2Sun What is the sum of mu2 losin 90 - θ ssun 90? - θ cos θc so θ= = 125 1.25 125 How to write 125/100 is 5/4 I don't even know cos θc cos θc, do I? Why did you do this? Why did you do this? Never mind, think about where cos θ comes from. Come on, shift here. Shift here, from there, cos How does θ come to sinθ? =Maa /மகா சோதி sinθ θ c =மாதி r means rarer Medium 1 / Medium How much 1.25 25 This is you 100 / If I write 125, what is the sin θc? 4/5 Then we need cos θ, right? What happened to the trigonometry root cos θ? How can we write 1 -ssk θc so 5/4 Ars Route 1 - 16/25 5 comes out 3 answer 3/4 sin θ = sin inverse 3/4 Now you are asking the same question in 2019. You have come, do it yourself, same answer. It doesn't matter what happens in 2019, you own it. Make it okay to make 2019 your own. Make an effort. Next see Critical Angle for A denser rarer interface is given. θC = 45° Speed ​​of light in rarer medium Velocity of light in rarer medium 3e10 Power 8 meters per second speed of light How much is the denser medium? He is asking. It is very clear to us. We know that sin θC = 0/3. Is inversely proportional to velocity So what happens here is I get velocity off. Denser / Velocity of Rarer Witch Is Equitusion 45g So we find out the velocity of the denser Do 3e 10 power 8 = w/w So 3 2e 10 power 3 should be multiplied by 2. Okay vd = 3/ 2 actually vd = 3* 10 power 8 / 2 1/ 2 value 0.707 * 3 makes 21 2.12b 2b is the answer you get 1/ 2 If you remember these values ​​a little, Problems will be solved easily. Okay, did I miss anything in this? Vision of Total Internal Reflection We have to say one fish. Application off Total Internal Reflection is a miss. I thought, "Oh, that's a vision." Off Fish I don't know why a fish has this vision. This is what we have, whenever we see it. Let's say our water is like this. Our fish is somewhere in the water here. Fish is at H height from water. Suppose fish is at a height of H from water. There is. The vision of the fish is never Circular vision of the Untodamma Fish Vision When Circular Vision With Radius That means a light ray from here to here. If a light ray goes from θc correctly You think they went with Angle? If we draw a normal here, this is θc. This is also θc so this light ray is like this It will go away. Same here too, lighter. It will go away like this. So fish in this area It means you can see. Fish is always That's what you see in circular vision. It appears in the circular area. That's it. So now you can do this once Triangle is something like a triangle. Observe the triangle. That I know the adjacent side in a triangle. We know the opposite side, so why not? The equation is tan θ = r/h or r = h tan θ. r = h/scr Rut 1-Moosk Where did it come from? sin θ = 1/moo so this is θc 1/moo Rootovermosk -1 Oh, this is a beautiful song -1 θ means opposite side times adjacent side. What is Mu Square-1? Yes, this is a small point. I thought, "Okay, so let's start from here." Refraction portion complete Now we are entering into Prism. Prism and we still have two left. There are concepts like prism lens, If it's two, then you can say Om Namah. Oh my god, you're okay. How many marks is required to get 97 percentile? Wanted for safe 1000 170 marks Ravalamma Prism Easy Is My Love Breakup Nayano, you have loves and breakups for that. Be a happy man. Sam Chowdhury Be very happy celebrate you Got a breakup. I have half a portion, when will we have it? This college has a grand test. Rayalamma will give them grand tests. This is the time where you need to start your If the grand test is not written, the grand test Grand Tests are still difficult If you don't write it down, it's hard to sell it. f67 potentiometer nuclear Reactor diagram materials vary There are. Then if you are confused Whatever is in the academy textbook is In Draw Cheyamma Academy Textbooks Draw whatever it is. Okay, prism is. Very very very easy concept so prism To see, we draw like this Let's do it to actually see the prism. It's like this. This is a three-dimensional Structure A prism is made of glass. It looks like this, but we draw it. Let's draw it like this, here is the base It is said. Correct for the base of the prism The angle of the opposite side is It is called a prism. What is a prism? Angle of Prism R Refracting Angle Angle of the prism or It is called the refracting angle. In the prism What happens when a light ray enters? Then this is my incident. Let's draw a normal here. This is one. Normal, that normal, and then another normal. Also draw normal to now this What happens to the light ray if it actually The light ray should go like this but in the air When it goes from glass to glass Bends Towards the Normal Incident Ray refracted ray again it bends away From the Normal Emergent Ray Incident Ray refracted ray emergent ray so in this If we write the angles, we get this. Angle of incidence first Refraction so first refraction Angle of refraction for the second time Refraction has finally come out. We write the angle e as We will write this as I1. Emergency Young Is Also called yes i2 i1 young of Incident i2 Angle of Emergencies OK So there was refraction twice. Air to glass Glass to air two Refraction occurred several times. Now We use the same snails for this too. If not in itself, then in this small I will tell you what the conditions are. I will tell you that there will be a derivation for There will be a Marx derivation now I I don't take that derivation. Madam, I did derivation in the exam. I will bring the formula and then We don't have that much time to solve problems. So, there won't be that much time in JE Mains. Definitely if you are preparing for IPE. In the middle of that four-mark derivation, we have A condition arises, what is that condition? Because i1+i2 = aup delta a1+a2 =Madam, what is the angle of this delta? The deviation is like this, the light ray should go like this The light ray that was supposed to go like this went like this It came out, so how weird is it? If we extend this back This is how the angle deviated. It was supposed to go like this, so how much? The angle is deviated, which we We are Delta, so what is Delta here? Delta is the angle of deviation. Watch carefully for the angle of deviation. But we have a different condition in this. During Angle of Minimum Deviation I need minimum deviation. Minimum deviation is DeltaA Delta Normal angle of deviation deltaA What is the angle of minimum deviation at this time? The first thing that happens is the refracted ray. Refracted Ray Becomes Parallel To base of prism This refracted ray is parallel to the prism base. This refracted ray is going to end. It becomes parallel to the base of the prism. When it's parallel, it's parallel. Then I will come. So when it is parallel, I1 = I2. It is assumed that A1=A2 It becomes what is called r. Now this Substitute both here. What exactly will happen to us here? Since i = a, then deltaA becomes /2a. = a/2 From here we have our famous formula Coming soon. aUp DeltaA/2 /son a/2 If you are lucky, then Very lucky enough to be directly on this formula. Formula substitution will come, you are lucky. Good luck, the paper will be favorable for you that day. If so, learn this formula and go. Direct Formula Substitution Come. This Delta A is a one-time He also asks me to find out from the graph. I will tell you that too. Okay? Here If we take delta here i, then its graph is You're welcome. Where is the minimum value? You should take this as a Delta A. He gives a graph every now and then. From the graph Take deltaA and put it in the formula A substitute will have to be made. This is Point number one regarding Prism What you need to know. And Prism What happens in dispersion? Another most important thing in Prism Point dispersion It's not that important, but I'll tell you quickly, so quickly in Prism. If we take a prism, then if this is A white light in our prism prism Enter the white light when entering. What happens when it gets divided? IntuSeven Colors Red Light Light Outside The blue light also comes on. Shouldn't the red light and the blue light be displayed separately? Seven colors will come in the middle. Remember this very much. What's important is that this is a blue light. Is red light the same wavelength as blue light? Is less than the wavelength of red light We know that moo is inversely proportional. To Lda So Refractive Index of Blue Light is greater than refractive The refractive index of red light The higher the index, the higher the bend. Its refractive index is low. That's why it actually bent less. But the white light should go away like this How much is the red light because it's bent like this? Delta R is bent. How much is the blue light bent? Deviation Delta Violet R Blue Violet R Blue Don't mind Violet Blue Don't mind at All so red light is so distorted that it turns blue. The light is so distorted that we have to deal with it. A small concept of thin prisms Undamma in Case of Thin Prisms In the case of thin prisms, we have a small Let's consider the formula, it's delta. Equally -th EA delta =th 1 EA This is what we mean in the case of thin prisms. Consider then that DeltaA = The angle of the prism does not change, so the prism does not change. What does not change is refractive if the color changes. The index will change. Also delta = Muva -va ea violet blue never mind you Whatever you write, no problem, okay, next. Now what is the angular deviation? Here come two words: yungular Dispersion Dispersive Power First Let's move on to angular dispersion, what is it? Angular dispersion This is represented by θ. Angular Dispersion is very simple θ = Delta Who Big Delta Delta - Delta That's it What is the total deviation of delta v - delta a? What happened is this dispersion? Angular dispersion again What can be written in the delta place? Part 1 EA In the minus delta place, muA-1 is ea so If you get a plus or minus in this, then it's a move - muaa *Is this the same as angular dispersion? Here comes another definition like this: Dispersive power Dispersive power is what Omega does. Represented. Dispersive power Definition of Younger dispersion / DeltaY Yellow Color Yellow color is The average color is between red and violet. The average color that exists is yellow. What can I write in place θ place What can we write in the text? We are sorry. That delta can also be written as delta - DeltaA/DeltaVa Somulus Substitute If you do it, it will be a move - muaa /muy -1AA It's canceled, so this is for Omega. Why all this? We are learning what is the purpose of Learning All This means that we have a I will give you some good question papers. Lightly toughen with a little prism. If you want a paper, he asks for two conditions. Two conditions are dispersion. Without deviation Read the question carefully. Dispersion Without deviation next Deviation Without dispersion So what happens in this is two things. Prisms in opposite directions He says, "Pedatha, so he takes a prism." Its refractive index is three. Let's say Let's say its angle of a1 is Attach another one in the reverse direction. He does. This is moo2, its angle is a2. Let's say. The white light has entered you. What should happen is dispersion, but There should be no deviation, which means dispersion here. What is Younger dispersion θeta total? Should not be equal to zero but delta Deviation Delta Total Should Be Equal To The Delta Total is Nothing But DeltaWap Delta should be equal to the delta of the So first of all, what is the formula? Write a1 -1 * a1 + a2 - 1 * a2 should be equal to 0 if here The minus symbol comes because of prisms. Prisms are in reverse. There are so here is the minus symbol What does it mean to say that it will happen? The colors will be divided. The colors are divided and come out. Blue Color Okay, blue is fine, but what about yellow? That's it. Do you know what that looks like? Parallel to white light. It will be yellow light, see white light. They are parallel. They are parallel, that is. Deviation Delta Zero Next, look at this condition. There is a deviation. No dispersion means delta total should Not equal to zero dispersion zero To be Dispersion should be zero, delta zero. So θ2 should be equal to What does "ji" mean to us? It's like "moo-moo" right? θ is muv - mua so muva - mua Muaa *Aepma Dash - mua dash *a dash should be equal Minus symbols come here for the two pairs. You can happily transpose. There is no problem with that. That's it. What else do you know about prisms? Don't learn anything extra. That's about Prisms, don't learn. Someone from It and You I have never met before. If you have heard the said ray optics class I told you a very detailed class with Large amount of PY questions those classes If you listen, this class will be dead easy. You don't have to, so after listening to this class, you Also practice the questions okay a ray Off light suppers minimum deviation when Incident of Prism Having Angle of The prism equals a= 60°. Refractive Index of the Prism Material too= 2 gave How super is the angle of incidence? Dead Easy and It Suffers Minimum Deviation When the incident prism is angled Prism First of All Angles What formula should be used to calculate incidence? This comes down to the same formula. Mu is sin a + delta a/2 / sin a/2moo We need the root i in place, right? You will find out. O Refractive index of prism is 2 Angle of incidence Actual angle of incidence That is, ap deltaA/2 Why do all this? I don't need all this. Instead of this, you write i. Write the placeholder * sin 30 3/2 3/2 Where do we get 60°? The answer is 60°. Very Easy Question Next Thin Prism p1 How many times have I said this? What happened was a repeated question that scared the mother. This is the real shameless number. It is a question that is given without changing anything. This is the question now in 26. We shouldn't expect it to come. It has already been repeated 10 times. If you come, it means you're lucky, Thin Prism. P1 Angle 4° 4° having refractive index this One this one this one ok next another Thin Prism P2 has its refractive Indexmoo2 Also What did that dispersion give? Without dispersion? Deviation means delta total should be Equal to Zero Khatam Kahani Moo1-1*a1 =m2-1*a2 So 1.54-1* 4= 1.72-1*a2 You need to find out the angle of a2. Super Dead asked how much the Prism P2 is. Easy Question Annamata Next Refractive Index of Material of Prism The material of the prism itself gives cot a/2. What is the angle of the prism? What is the minimum deviation and what is the delta A? He asked, "Start the formula." aUp DeltaA/2 / sin a/2 what is this this is cot a/2 cot means cos/son Gone. So cos a/2 = sin a + δm/2 Here we use Mathematics Brain It's over. How to equate sin with Nika If you do it at 90°, you're done. There is a 90° difference between the two. This is it. 90 - a/2 =Sun a/2p DeltaA/2 It turns out that π/2 -a/2 = a/2p DeltaA/2 This is what 2π π - 2a π -2a is true, right? Answer π - 2a S Next When you see this question They are normally afraid, but what is the first thing? Here, x/4 is given, this is it, something next to it. Liquid prism is not difficult. Let's read the problem. Okay, what did he give us? Of equilateral prism first of all What is this? What is an equilateral prism? Value 60g Annamata Immersed in A Refractive index of liquid n Here is the liquid and its refractive index. Index This is for Incident Angle 60g incident ray from here This is the incident ray here angle 60g is the side of the refracted light beam. Just Graces Along A Refracted Light It went like this, just for fun. How much value should be taken for 90 degree cut? Kahani Kel Khatam Dukan Bandh Snells La You don't need a prism like Madam Snells. There are two refractive indices The angle of incidence is the angle of There is refraction, it's like going for snails. Prisma Glass Benefits Are Unnecessary Snells That's why I said it like Snells. First thought, if you have any problems before You should go near Snell's Law. In Snell's Law, this is an incident, this is an angle. Of incidence its refractive Index 1.5 So 1.5Sun 60° equals its refractive index. We know. 90° Angle of refraction 90 degrees It turns out that 1.5 5 means 3/2 and 3/2 = n. 3 should be taken inside 9= 27/4 How much is 27 in the answer x place? It's easy for us to be afraid of something. Nothing else. Last but not least refraction at Single spherical surface and lenses We came back for another 40-minute class. That's another 40 minutes class 40 Minutes cause problems. So the concept is half an hour. Okay The refraction of curved surfaces Even in curved surfaces, we have two types. There are curved surfaces. Single curved surface Double Curved Surface Single Curved A glass slab to see the surface A glass slab with a curved edge like this A surface or a glass slab like this Curved Surface So Single Curved The surface is straight on one side. These are single, with one side curved. Refracting Surface Double What is a refracting surface? Convex lens as well as concave lens So let's finish this first. This is very much after the concept of a place. Let's come here, okay, so single. Let's go to the refracting surface single On the refracting surface Remember I am not going to Go for the Depth of Derivations First Here the image will be formatted, it will be for this Act like an object and light up again here This is how it goes from I'm Not Going to Go This is not the time for that. So simple. What do you need to solve the problem? That's all I'll tell you, okay? First of all single refracting Let's start with the surface. Single Refracting Surface In a single refracting surface we have I said there are two types, right? One. Glass Slab with Convex Surface Glass Slab with Concave Surface Any of these also have a principal axis. The radius of curvature will be It all depends on the focal length. Now what did I draw? The curvature of the principal axis So its radius of curvature is This side is curved this way. So the radius of curvature here is There will be a center of curvature so this This is the center of curvature, this is the radius of Curvature is the same as the optical center. This is also the center of curvature for this The optical center is the distance radius of Curvature is all simple, isn't it? They are normal and refractive. When it comes to the index, it's in a medium. Light travels from one medium to another. So this is muva this is moo2 this is moo this If you want Mu2, here is a single for us. The radius of curvature is careful. Look at the single radius of curvature. When there is a single radius of curvature Formula Mu2/th -Moo1/ u = bundle - bundle1/a This is the formula. Simple Formula Basic Formula Remember, Madam, what is this? The formula is the same for this too. O This also comes with the same formula. Otherwise, what will be the difference? I think there will be a difference. This is the same formula. This is the same formula. What is this, Mom? You can't tell me. What difference does it make if I do this? I said everything on the left side is positive. All those on the right side will be sorry, sorry. Everything on the left side becomes negative. Everything on the right side will be positive. Did I mention it has a radius of 10 Which curvature is on the right side? So this is it. A positive symbol should be used. This What is the radius of curvature of the left The side should have a minus symbol. Object distance is always negative. That's an unnecessary object for you. Distance is always negative for that. You don't have a problem with the radius of curvature. Positive negative truth that's it Madam, I have an extra in this. Tell me the information, it's an extra. Information magnification In this, the magnification formula is a Third/Second 2 extras come, the rest are the same. It will be the same. If you can learn that Learn or leave it, but this is it. Learn one by one. That's all single. What else is a refracting surface? Don't learn, just leave it. Now Will move on to double refracting? Surface What is a double refracting surface? This is where the lenses come in. I hope you All definitions of lens I think I know, I'll answer this directly. I'll go, I'll go to the table. We have a convex lens as well. There will be a concave lens. What's next? Focal length object Distance image Distance image There are two types of distance: real And start the virtual image again. Focal length of a convex lens Focal length for a positive concave lens Any negative object distance Negative real image convex lens In S real image form becomes real Negative virtual image to image No real in positive concave lens Image Only Virtual Image Only Form It will be. Okay, this is a basic point for us, but in this Also remember when, Mom. All those on the left side of the surface are negative. Everything that is on the right side of the lens should be taken. It's basic to take it positive. Remember. Next, we have lenses. The formula that comes with lenses is the first. The formula is the lens maker's formula. Lens formula consists of two lenses. Makers What lens makers are you using? What is the formula? What is the lens formula? I don't want to remember, how can I tell you? The second thing to remember is the lens. Formula That lens makers formula starts What is the formula, lens makers? Formula 1/A = Moo -1 Ev/A1 - 1/2 Here 1/a= 1/th -th/u Sign for everything Conventions Are You Having to Apply Conventions have no other way out. Apply sign conventions precisely. It has to be done and from now on I will say Please listen carefully for 10 minutes. The total will be cleared in just 10 Listen carefully for a few minutes. Those mules for you. Two formulas appear together. Take a look at it. Mu2 -M1/A 1/A=Moo-1 * 1/r1 1/a2 If there is confusion, then two Radii of curvatures are visible in this Formula Looks like a single radius of curvature This formula is the same in the given information. This formula gives the radius of curvature. Given information, two radii of The word lens has curvatures. It seems this formula should go. This Easy magnification from here too Easy to use, the power of lens magnification After saying that, the application part I'm going to listen carefully before That's just the power of learning. Off lens is symbolized by P. Symbolized by the power of lens. Then magnification Magnification is what I am, rules. As I said, the same rules apply here too. m plus minus m < is greater than The same thing will apply again. Power off Lens is simply reciprocal. If f is off then f is definitely in meters. Must be because PowerSI units How many people remember diopter? Capital should be in SoSI units. IfF Given in centimeters with 100 above. Multiply centimeters easily The combination will then expire. I will also mention the lenses here. Combination I think he gave me off lenses. Combination of lenses Combination of In the case of a lens, the simple gap total = P1+ p2+ p3+ and so on means 1/f = 1/f1+ 1/f2+ 1/f3+ and so on and so forth Remember in the matter of power Even though it comes to concave, that convex Power in the concave even when it comes to Power positive in negative convex Power also depends on the same focal length. It will be decided. How to do all this Applications are a 10-minute wait. Make full applications and I will tell you the end. The story ends, so negative, sorry. Same when it comes to magnification. Formula Height of the image / Height of the Object = v/u means something is missing Negative sign missing Remember the negative sign here. No, there is a negative sign in the mirrors. Sign Conventions If It Is Applied Will be. Let's go into the problems. From what I have learned now But the lenses are actually the same. Go to the application part How to apply Must do for the most important part Going to Applications Various applications in applications Look carefully. When Lens Ease Lens off Refractive Index Mooja Is In Air This is the same condition next same lens Placed Inside Liquid Off Refractive IndexMoo Liquid You can analyze this once. I need to be sure which formula to write first. Of all the lenses are in the air so these two Watch Now 1/A in Air Equal What should I write about Mu? -Because I said what I said I told you, do you remember what Indaka said? Where did the refraction occur? The lens is the lens is in the air. That means air next to this, air next to this, and more Why does refraction occur in glass? Refraction occurs in the lens. I What did I say about the relative relationship? The refraction occurred in the morning / the incident occurred in the evening. gg/moo8 air is actually What did I write? Write it down if you want, I'll write it down too. If you want, check it out. -1 * 1/r1 -1/r2 Actually, what lens is that? Not done, leave it like this for now. I will tell you how to write which lens. Next, put it in liquid. Now this is very crucial, Dad. Write carefully. One by one by focal length. Inside Liquid How should I write this? Now Mu Off Liquid / Mu Off Should I write glass? Be careful now. Observe where the lens is placed. Put the liquid inside This is the lens inside the liquid liquid. Placed. Where is the refraction again? What happened inside the lens? What did you write here? / Air What should I write here g / Liquid So write here Mooja / Moo Liquid -v * 1/Aa1 - 1/Aa2 If you write these two, it is enough. He usually asks for a ratio for both. Ratio asks but maxim many I can't write this, how should I write it? Refraction occurred here or here. Refraction occurred inside the lens here There is air around the lens here. There is liquid around it, very important. Point two About Combination of Lenses Let's talk first of all convex. Lens by Convex Lens by Concave Let's take the lens. As you all know A biconvex lens is one whose Radius of curvature is the radius of The curvature remains the same. What is that, Mom? First of all, listen carefully to a light. When Ray came and fell like this, it was the first time Refracting Surface Who is this first? Refracting Surface First Here Refraction occurs. Later here Refraction occurs. So this is R1 for you. This is R2 by R1 in a convex lens. They are the same. In a biconvex lens R1 and R2 are the same. How do you do this? You have to understand the same lens. How to understand what a plano is Convex lens is another plano convex lens. So, they attached both lenses. See how I write the equation here. 1/A = 1/2 -1 Because it's air, because it's glass Simply mu-1 first refracting Which side of the surface is the right side so 1/r - Which side is it on? Left side so -1/r So how much did this get? 1/a = moo -1* 2/r 1/r+ 1/r 2/r This is a biconvex lens. Same as concave lens Let's take it. In a concave lens, A1 = A2 =That is also a plane or a concave plane. We have a concave curve, so if we write the equation here 1/A = Moo -1 ImU -1 This Which side is negative? -1/that - Which side is this positive 1/r? So how much did this get? 1/f = 100 -1 * -2/r Minus symbol for concave lens Comes. A little more practice. So please look carefully. Let's practice. I have one like this. There is a block, okay, I am the center in this block. Put a lens in This is mute. This portion Watch this portion carefully. This portion is mutha. I filled up this combination for you. This guy asks what the focal length of the lens is. What is the focal length of the combination? Radius of curvature, which is also the radius Of curvature How should you understand this? How do you understand this? Did you know that a plane is concave? A convex A concave Plane concave concave plane plane Concave Convex Concave Plane This This should be understood in three parts. f1 to f2 to f3 formula I have to write. 1/ f1 = third -1 e plane 1/ What is the radius of a plane? 1/ Infinity - This is the radius. Where is the curvature of the right side? So 1/f1 =f1-1 E-1/A Can you write or not? Next 1/ f2 = m2 -1 What are two convex lenses for this? I just said two convex Directly 2/a when there are lenses Can be written Is it lit or not? 1/ f3 = m3 -1 e How is this negative? So -1 1/That - Plane 1/Infinity So 1/ f3 = m3-1 E-1/A These three should be added in JE Mains This model is well repeatable, JE. This model is well repeated in the mains. Wow, you should be able to write things like this. This is the lens mirror combination for you. I think he gave it to me. This is a lens. Okay, he quoted this here. What happens now? A light ray enters. Suppose it is refracted. Reflected and refracted again It will be. Refraction twice Once the reflection is right so p total Equal to 2 times the power of lens Power of Mirror or 1/f = 2 Times Off/F Focal length of lens/lens What is the focal length of this mirror? Mirror Mom What Kind of Mirror Is This? This is what kind of mirror is concave. Mirror Concave Mirror Focal Length How many A/2 is there? So 1/A place is 1/A/2. That means I know 2/that and 1/a in place. Third - This is a convex lens so 2/A These two are substitutes there. They will do it. So, do you understand anything? This is how we tackle problems. Very very very important model after Last but not least, cutting of lens Cutting of lens The lens is divided into two parts. There are many ways to cut, so We took the same lens, this lens. Cut one like this, cut two like this. So if I cut it like this, I get two The pieces have arrived. Its focal length is F. Its focal length is Let's say you cut it like this, what happens? This piece is a piece of jewelry for you because it's cut like this. Any difference in radius of curvature? Did it come or not? Difference in Radius of Curvature If not, there is also a difference in focal length. What is the focal length of this lens? What is the focal length EF but here Look, convex should be convex. Convex Plane Plane Convex Radius of curvature effect has been If the radius of curvature changes, the focal The length changes so it becomes 2fftafft. 2ATF becomes the principal axis. Now this is what happened when it happened far away from Isn't it? Now this is it, what am I to do with it? Cut after cut Then I moved a piece away. Okay, how did I get a piece of it away? Equal to the principal axis I have carried this far into the distance. If x is distance then this is also x distance. How many number of images will be formed in this time? He says it will happen. Do you know how many farms will it happen? Because when you move away, this It works like a different lens. What works like a lens? The principal axis comes. So then A light ray is a ray of light from which It is refracted from this. The light ray refracts so that two Images will form. Number off Imagesta What's the problem if they're close? No, it's only different when you move away. The principal axis is developed into two The number of images will be formed here. The single number will be of image form. So remember this one small point. In the case of lens, cutting off the lens is all We've said it all, there's nothing more, that's it. This is all about the lens, okay lens. What more could there be in this matter? See question 2023 Bi Convex Lens of Focal Length 10 cm is cut entirely identically. Parts Along a Plane Perpendicular to The Principal Axis Plane Perpendicular to the principal axis so This is our principal axis for that. He cut it perpendicularly, that is, like this. What happens to each piece when cut like this? Imagine 2f 2f What question did Power ask? The power of each lens is the same as the power of each lens. What is the power of each lens at 1/2f? 1/2E f10 centimeters so above 100 5 AnswerFive diopters but this model In fact, this cutting model was released in January. Also comes. Either this or this cut Doing this is the same thing as cutting based on This concept will be available in January 2026. This model practice comes next. Do it. Next, this question once. Look, when did this question come to us? It arrived in 2021. Same question, same. Question you see. 2019 Same Two Same Two Same So start asking questions, you still The radius of both is not large. Okay, one is muva, this is mu1, this is mu2, so He asked what the combination focal length was. So first of all start with 1/ f1 Do it. f1m1 -1 and the first plane is 1/ infinity The negative left side is so - 1/that. So how much did 1/f1 get me? 1-1 This/That So /that is written next 1/ f2 =m2-1 What does this have? Concave plane concave Negative So -1/That -1/ Infinity -1/That -1/ Infinity 1/ f2 = minus so -m2-1/a Yad said to combine these two. You will do these two things so 1/A = 1-A/A. - Mu2-1/A So answer Let's write that direct f = that /m1 -m2 r/m1 -m2 This is the answer Okay Can you solve this problem or just check once? Take this 10, minus 10, this is Does the plane appear concave? Concave Plane Concave Convex He gave distances in between. 30 5 10 Find the distance of image From ObjectO Where did the image come from? Asking for a combination of lenses First of all, put everything in it. =to live/to dwell Make it fast, first lens one. Let's start from 1/10 = 1/th- Manas That 30 cm first object is -1/-30 So 1/v = 1/10 -1/30 So 20/300 How much did it cost? It cost 15 centimeters. This means 15 cm. Look, this is 5. This is 10. So This is 5 cm, right? This is 5, this is 10, so It has formed correctly around this 15 cm. Okay, look at this. 15 minutes is here. It arrived. Then how much is this lens? The distance is 10 for this lens. What is the distance for a 10-foot lens? 2 Applying the formula for lens 2, it is 1/-10. = 1/v -Which side of this is the right side? It has a right side so It will be positive, right? It will be positive. 1/10 So Positive Ah Moo -1 No No No This is 15 cm 5 10 This is 10 It will be. We need to subtract that, so 1/v = 1/ - That Minus this is exactly 1/10 +1/10, right? -1/10 2/10 5 I will write v directly. v = -5 meters. Centimeters -5 means we've got this side again. So I have to put it back on the lens. This will be the object distance for this. It's already -5, which means it's this way. 10 times 5 is 15, so this is 15. I'll wear it for 15 and find it again. What to do if you can't find out? Distance from there to here I have to wear it from there to here. Combination distance should be maintained. Calculate Calculate. We don't need the same problem. See if you can do this problem convex. Lens of refractive index focal Length in air is immersed in water Change in focal length of the lens Did you see the question so in the air? Air Lowa/ f of air equals how much air in that air is 1.5 -1 e Focal length refractive index Okay, he gave me the focal length, wait here. Focal length is already given. Refractive Index of Water Is Given Okewa/F of Air This is easy Question The mind of the lens is given to us. Moo of Lens 1/That thing is coming Or to write 1/a1 - 1/r2 refractive Index Focal Length Radius of The curvature will remain the same, keep it that way. Sova/Fair Set this aside. Next/ f off What happens to the liquid inside the liquid? Mew of Mew Moo of Inside the Liquid Lens / Moo Off liquid -1 This too This too 1/That Get ready. But this needs to be solved, that is, mu off. Look at how much the lens is. Lens 1.5 means 3/2 * 3/4 ​​so 9/8 No, if you watch it once, you'll see it 8 times. There is more. This is 8 times faster than air. There is more. So how much is 18 in air? That is, Nono 4 times 4 times 3/2* 3/4 ​​in 4 times so 4* 18 is how many 72 so 72 The answer I think is 54, minus 72. You have to do that 18 again, so the answer is 54. Please check it once it arrives. Again easy question next identical Thin Bi Convex Lens of Focal Length 15 centimeters Refractive index Are in contact with each other space Between the lenses is filled with Liquid of refractive index first Of all carefully watch thin by Both convex lenses are in contact. Fill the space between these two. So how do you take this? Convex Concave Convex This is if convex concave convex This is the same, isn't it? This is the same for you. Refractive index is the same as this. Also, this is the only one, so these two are Same radius of curvature so same 1/Who 1/ f total equals 2 times of f Convex/ f Kankevva/ Write convex 1/ f convex =a convex lens is refractive For a convex lens of index 1.5 1.5 -1 2/r is 2/ radius of curvature focal Length is 15 but radius of curvature is 30 It will be. Next 1/ f concave = How much was the concave lens filled with? 1.25 -1 * What happens to a concave lens -2/r? r means 30° 30 cm that's it these two Just substitute it and it'll be done. Okay The same size images are formatted by Convex lens by convex Convex lens when the object is Place 20m R at 10 centimeters from the lens focal point Length of the convex lens is two Just apply the formula several times and you're done. Convex lens magnifies object twice Again an easy one placed in two places We don't care about the question, it will be fine. Questionnaire Same other questions are difficult. Are there any? Watch this 2019 I Can Be Respected SI can be considered single. Refracting Surface Can Be Yes Single Refracting Surface Radius He gave off curvature. This surface is separate from the media. Refractive indices move 2 We need the formula right away, click here. The Distance from a Refracting Surface At which parallel beam of light ray will come To focus first of all where is ya? Infinity is near. When parallel Where do the beams of light rays come from? How much does it come from infinity? He says find out, 1st, 2nd. 1 34 R 7.8 mm These are all in centimeters, right? The answer should be in centimeters, which means mm. 0.78 centimeters is 78 centimeters. That's all he said and that's it, super easy. Question step 2/v -moo1/u =m2 -Moo1/A Easy question is so 1.34/v -m1 is infinity = 1.34 34 -1/0.78 78 dead sheep calculation The portion is a little large. Do the calculation part. We did everything else. Most of the problems are me. I did it so well, the models are so deep. If you want, go to Everyday Live. Series R HVA Series Sary HVA I said in the series, "So you got it?" Any Little Confidence Problems Can you do anything? Have you got anything? Little Confidence I only got 27 marks. In Advanced Even if you get 27 in Advanced, it's still good. Marks rank will come Ebset ko yus hota hey royal mujamll Will the effect be 100% usable? How Many of You Got Little Confidence I also believe that 100% confidence will come. I won't say, but what is ray optics? The fear is gone. First of all, I don't care. It doesn't matter if I try. Have you gained confidence? Royal Muzammil Edset Co Use Hotahe Tumar Hyderabad Hey Kya One by one, the boys are calling each other. Very good father. O 1220 Once you gain confidence, it's very good. Varadhi S says Susruth is a very good boy. Our Boy Everyone If you like the session, there's a like button too. Knock and then go to the attendance. Because we like you, madam. You won't get any likes. They say. What about IP sessions in Whitey First Year It Will Take A Little Bit of time but I will start. Okay good Yashwant Gangadhar Talks with Real Heroes How much does overseas engineering cost? It would be nice. The penny is the Supreme Being. Santosh Santosh Chari Venkatapuram Thank you so much Royal Muzammil Thank you so much Okay mommy boy, take good care of everyone. Practice for an hour at night. Are you going to sleep anyway? Don't be offended, but it's a one-hour ray. Optics PY Qs Ala Practice It will be good to do it and sleep. Good Falling asleep. Give a good motivation. Let's give it good. Motivation Are you getting notes? Buy tomorrow notes. This video will be updated by tomorrow. In the description, in the comments of this video Notes in pinned comments I will post it on the Telegram channel as well. But tomorrow will be the day to put notes. Tomorrow What else can I say? The entire apartment fell silent. People, my voice is ringing. Just a little fear of being scolded. Madam, you will have those classes again from tomorrow. They say don't tell me, you should go away. Therefore That's why I lowered my voice a little now. Otherwise, our entire bronze statue I think the apartment is haunted. Oh, they think a ghost has come. How to Improve Your Apartment Marks in Physics are not above par. 15 to 20 Advanced IIT B day That C JE Advanced Practice PYQ because it's right there now. It's not much time, what am I and what am I? Advance should be given, Anna also advance. The first thing to do is practice PYQ. What is the analysis when doing PYQ? The question asked you this, JE. A good pattern even in advanced It's okay if you can catch it. So this IIT B crack IIT Bombay is a cracker, keep going. Dad, don't worry, you'll get through JE Advanced. Even if you get 30 marks, it's still too much. Don't worry too much, it's okay, just keep it up. Practice PY questions of variety of Model Paragraph Questions More Than One Answers is more likely to be used. Marks integer type these are good Concentrate. Mom, I'm a physics teacher, please come. Royal Muzzammal Ban Javana Achcha Paisa B Milta hai logo se pyar Milta hai paisa Say more love, I love you, I love you. Parents say, "Oh, I'm so happy, my blood is so heavy." Muzammal Ban Jao Achcha Teacher It is because of your kindness that I am now in NIT. I am reading. Thank you Sai Charan. Oh my. Super Witch Witch One Father Witch NIT Royal Muzammil Are You Getting Inspired? From IIT Allu IASC to NIT Bold children are coming from. If you get a good percentile in the mains, it will be different. Colleges do not reduce fees. My father is not a big deal. No one compromises when it comes to money. My mother is in engineering. 110 marks if I qualify for IIT TpalIT Colleges Even TPALIT doesn't come for 110, it's a bit difficult. If you have category S How much salary can I expect if I Become a teacher like you I'm getting really, really big. Figure You can earn up to about one to seven figures. Don't worry, you can bring it. It's God's Grace First of All My Parents' Blessings and Hardship Work Hard Work Will Get You She also carries 278 figures. I am a NEET UG student and Following this class is what you can do. Follow Santosh Chari Venkatapuram You Have To Follow Follow JE classes, dad, NEET. I tell them over and over again, JE. Follow the classes. Short notes are the best these days. Mom, short notes are the best. Short ones. Notes are the best, Dad. Akhiranandan's speech increased to 80 plus Hey, you were a kid last year. Akiranandan used to be there. My best student Actually one of the best All the students are the best. One of my favorite songs is Akhiranandan. You used to be a student, don't you think? Mom You can afford it. I can but what is the use is not necessary. Why do we have problems? Because of you, NAIT I got a seat in Bangalore, wow. Karthik Boy 9991 Wow, this is so inspiring to me. Feels and God bless you all Dad, all of you, your hard work, that's it. This is purely your hard work God. Bless you, Ebset Paid Batch Rakti What is the color of Muzammil Royal Muzammil? You join or you join to make friends. Karda Royal Muzzammal Aaja March May Raktihu Paid batch is available only for you. Dostana logo ko be locke ispe daldo S Time 1220 Okay Mom Boy Everyone I will have one more session if there is any quit. Take it okay. Electromagnetic waves I have never heard of before. Did I mention it or not, electromagnetic? I wonder if I need waves or not. Tell me in the comments, I will do it accordingly. I will decide I am not able to find. Hey Royal Muzzammal, I'm so happy. Efset batch blood So only I am watching till now, okay? That is, if I am not beautiful to look at. People who don't listen to class say that they are not good at IT. Hyderabad Cutoff 99.98 98 I won't tell you in the offline center, Dad, I won't tell you. No I have to have now. I started the clock at 6 o'clock today. I taught class 6 to 9 in the Dhruti batch 9o. The clock is five minutes late for you. It's 9 o'clock to 12. Now you I said it on YouTube. Okay electromagnetic waves once Tell me, father, electromagnetic. Waves Madam, you have already said it. No or Madam you are electromagnetic Waves didn't say that means I will because one Shot class is enough for an hour and a half of electro Magnetic waves will disappear. And again You don't have to wait until the exam. I will bring you confidence. Electromagnetic Waves Just Tell Me Tell me in the comment section, Electro. Should we call this magnetic waves or not? Let's finish the week, okay? Are you a royal muzammal, who is Bhagavan? May Allah bless you with all the blessings. May you always be blessed with me. I will be yours forever, my dear. The one who kills with his hand is like a thorn in the flesh. Bachchoka Allah's prayer is for Kartihu ki Allah What is the name of the person who is the owner of the house? Pay high or sub people, that's all. Okay mom, so boy, everyone take care.