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MHT CET Physics question

PhysicsRay Optics and Optical InstrumentsMHT CET

A ray of light through air is incident on a denser medium at an angle 'i'. It is partly reflected and partly refracted. Both these rays are perpendicular to each other. The refractive index of the denser medium 'n' is equal to [MHT-CET 2011]

Answer: (D)

Solution

With reflected and refracted rays perpendicular, , so \dfrac{\sin i}{\sin r}\dfrac{\sin i}Extra open brace or missing close brace{\cos$

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Question ID VK-069546