MHT CET Physics question

PhysicsWave OpticsMHT CET

The ratio of width of incident wavefront in air and refracted wavefront in a medium is 0.8. If the angle of incidence is , the angle of refraction will be :

Answer: (D)

Solution

Widths are proportional to cos i and cos r, so cos45°/cos r = 0.8 giving cos r = 0.884

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Question ID VK-077019