AIPMT MAINS2012Physics-Optics
AIPMT MAINS 2012 Physics Prism MCQ Question
Type: MCQ-conceptual-Medium-Class 12
For the angle of minimum deviation of a prism to be equal to its refracting angle, the prism must be made of a material whose refractive index:
A
lies between √2 and 1
B
lies between 2 and √2
C
is less than 1
D
is greater than 2
Correct Answer
Option B
Detailed Explanation
For a prism, the angle of minimum deviation δ_min is given by δ_min = i + e - A. When δ_min = A, the refractive index n = 2 cos(A/2). For A = 90°, n_min = √2 and n_max = 2, so the refractive index lies between 2 and √2.
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