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MHT CET 2026 Physics question

PhysicsRay Optics and Optical InstrumentsMHT CET 2026

A thin prism in air produces the angle of minimum deviation . If the prism is immersed in water, the angle of minimum deviation for the same ray is (refractive index of water is 4/3 and that of glass prism is 3/2)

Answer: (C)

Solution

For a thin prism of angle the deviation is , where is the refractive index of the prism relative to the surrounding medium. In air: . In water: , so \dfrac{9}{8}$ -

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Question ID VK-096034