Physics-
General
Easy
Question
A point source S is placed at the bottom of different layers as shown in the figure The refractive index of bottom most layer is m0 The refractive index of any other upper layer is 
ray of light with angle i slightly more than 30° starts from the source S Total internal reflection takes place at the upper surface of a layer having n equal to
- 3
- 5
- 4
- 6
The correct answer is: 5
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physics-General
