Question

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17. The refracting angle of a prism is A, and refractive
index of the material of the prism is cot(A/2). The
angle of minimum deviation is [AIPMT-2015)
(1) 180° + 2A
(2) 180° – 3A
(3) 180° - 2A
(4) 90°- A​

Answer 1

Ur answer may be option C

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Answer 2

Answer:

option c is the correct answer