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MHT CET Physics question

PhysicsRay Optics and Optical InstrumentsMHT CET

A ray of light is incident on the surface of a medium with the velocity of light at an angle and is refrated in the medium at an angle . What will be the velocity of light in the medium

Answer: (B)

Solution

μ = sin45°/sin30° = √2 so v = 3×10⁸/√2 = 2.12×10⁸ m/s; speeds above 3×10⁸ (c, d) are

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Question ID VK-076970