MediumPhysics
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-- 5. A prism of refractive index √3 and angle of prism A is placed in the position of minimum angle of deviation. If minimum angle of deviation is also A, then angle of prism is
A
30°
B
45°
C
60°
D
75°
Explanation
Using mu = sin((A + Dm)/2) / sin(A/2). Here Dm = A. So √3 = sin(A) / sin(A/2) = 2 sin(A/2)cos(A/2) / sin(A/2) = 2 cos(A/2). cos(A/2) = √3/2, which means A/2 = 30° and A = 60°.
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