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Question

A ray of light passes through equilateral prism (μ=1.5) such that angle of incidence is equal to angle of emergence and the later is equal to 3/4th of prism angle. The angle of deviation is : -

A
30o
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B
600
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C
45o
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D
120o
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Solution

The correct option is A 30o
i+e=A+di=e=(34)A(34)A+(34)A=A+d1.5AA=dd=A2A=600(equilateralprism)d=300

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