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Question

When light rays are incident on a prism at an angle of 45, the minimum deviation is obtained. If refractive index of the material of prism is 2 then the angle of prism will be

A
30
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B
40
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C
50
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D
60
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Solution

The correct option is D 60
μ=sinisinA22=sin45sinA2sinA2=122=12A2=30A=60

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