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JEE Main 2022 Physics question

PhysicsRay Optics and Optical InstrumentsJEE Main 2022

A ray of light is incident at an angle of incidence 60° on the glass slab of refractive index . After refraction, the light ray emerges out from other parallel faces and lateral shift between incident ray and emergent ray is cm. The thickness of the glass slab is cm.

Answer: 12

Solution

By Snell's law, sin60° = sin r gives r = 30°. The lateral shift is d = t sin(i − r)/cos r, so

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Question ID VK-024186