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MHT CET 2022 Physics question

PhysicsRay Optics and Optical InstrumentsMHT CET 2022

A team of white light is partially reflected and partially refracted from a surface. The angle between the reflected and refracted light is 90. The angle of refraction is 30. The angle of incidence must be

Answer: (B)

Solution

Let the angle of incidence be . The reflected ray makes an angle with the normal (on the other side of the normal), and the refracted ray makes angle with the normal on the far side. The angle between the reflected and refracted rays is

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Question ID VK-093482