MHT CET 2024 Physics question

In an equilateral prism the ray undergoes minimum deviation when it is incident at an angle of . The angle of minimum deviation is

(A)
(B)Correct
(C)
(D)

Answer: (B)

Solution

For an equilateral prism the prism angle is . At minimum deviation the ray passes symmetrically, so the angle of emergence equals the angle of incidence: . The deviation is

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Question ID VK-093315