NEET2015Physics-Optics
NEET 2015 Physics Prisms MCQ Question
Type: MCQ-conceptual-Hard-Class 12
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
A
180° - 3A
B
180° - 2A
C
90° - A
D
180° + 2A
Correct Answer
Option A
Detailed Explanation
Using the formula for the angle of minimum deviation, δ_min = 2A - 180°, and substituting the given refractive index, the angle is calculated as 180° - 2A.
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