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MHT CET Physics question

PhysicsRay Optics and Optical InstrumentsMHT CET

A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of . The ray undergoes total internal reflection. If is the refractive index of the medium with respect to air, select the possible value of from the following.

Answer: (D)

Solution

For TIR the angle of incidence must exceed the critical angle, , so ; 1.2, 4/3 and 1.4 are all less

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Question ID VK-069326