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MHT CET Physics question

PhysicsRay Optics and Optical InstrumentsMHT CET

A circular beam of light (diameter = ) falls on a plane surface of a liquid. The angle of incidence is and refractive index of the liquid is . The diameter of the refracted beam is

Answer: (C)

Solution

The beam width scales as , with so , giving \cos\cos$ 45° =

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Question ID VK-069321