Angle of minimum deviation is equal to the angle of prism A of an equilateral glass prism. The angle of incidence at which minimum deviation will be obtained is
A
60∘
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B
30∘
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C
45∘
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D
sin−1(23)
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Solution
The correct option is A60∘ A=δm=60∘
At minimum deviation i=(A+δm2)=60∘