Worked example: Total internal reflection | Ray optics | Physics | Khan Academy
Channel: Khan Academy India - English
Date: 2022-09-22

In this video, we solve a question on Snell's window and also deal with refraction and TIR across 3 mediums!

00:06 1st Question
00:51 Drawing all the light rays from the source
02:38 How do the light rays look when they are incident at critical angle?
03:01 Using Snell's law to calculate the critical angle
03:59 Relating critical angle with the angle subtended at the source
04:55 2nd Question
05:48 Comparing the refractive indices of the three mediums 
07:43 Using Snell's law to relate the refractive indices of medium A and B

Practice this concept - https://www.khanacademy.org/science/in-in-class-12th-physics-india/in-in-ray-optics-and-optical-instruments/in-in-refraction-and-plane-surfaces/e/total-internal-reflection

Master the concept of Refraction at plane surfaces through practice exercises and videos - https://www.khanacademy.org/science/in-in-class-12th-physics-india/in-in-ray-optics-and-optical-instruments/in-in-refraction-and-plane-surfaces/v/refraction-and-snell-s-law

Check out more videos and exercises on Ray optics and Optical instruments - https://www.khanacademy.org/science/in-in-class-12th-physics-india/in-in-ray-optics-and-optical-instruments

To get you fully ready for your exam and help you fall in love with Physics, find the complete bank of exercises and videos for Class 12 Physics here - https://www.khanacademy.org/science/in-in-class-12th-physics-india

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