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MHT CET Physics question

PhysicsRay Optics and Optical InstrumentsMHT CET

A ray of light is incident on one face of an equilateral glass prism having refractive index . It produces the emergent ray which just grazes along the adjacent face. The value of angle of incidence is [MHT-CET 2020]

Answer: (D)

Solution

Grazing emergence means with , so and ; then

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Question ID VK-069510