Physics-Optical Instruments

NEET Physics Optical Instruments MCQ Question

Type: MCQ-diagram based-Medium-Class 12

A ray of light is incident on a prism with an angle of incidence ii. The refracted ray inside the prism becomes parallel to its base for a minimum deviation DmD_m. If the angle of the prism is AA, which equation correctly relates these angles?

Question diagram
A

2r = A

B

D_m = 2i - A

C

i = (A + D_m)/2

D

n = sin[(A + D_m)/2] / sin[A/2]

Correct Answer

Option C

Detailed Explanation

According to the context, at minimum deviation DmD_m, ii is given by i=(A+Dm)/2i = (A + D_m)/2.

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