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Question

A ray of light incident on a 60 angled prism of refractive index 2 suffers minimum deviation. Angle of incidence is

A
70
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B
0
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C
45
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D
30
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Solution

The correct option is C 45
μ=sinisinA2;2=sinisin(602)=sinisin30sini=22=12i=45

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