MHT CET 2024 Physics question

PhysicsRay Optics and Optical InstrumentsMHT CET 2024

The angle of incidence is found to be twice the angle of refraction when ray of light passes from vacuum into a medium of refractive index . The angle of incidence will be

Answer: (B)

Solution

Let the angle of refraction be , so the angle of incidence is . Snell's law from vacuum: , so , i.e. . Cancelling gives , so $r =

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Question ID VK-099768