NEET 2019 Physics question

PhysicsRay Optics and Optical InstrumentsNEET 2019

In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?

Answer: (4)

Solution

The critical angle is defined as the angle of incidence (in the denser medium) for which the angle of refraction in the rarer medium is . By Snell's law, with

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Question ID VK-092402