First slide

Prism

Question

Under minimum deviation condition in a prism, if a ray is incident at an angle 30°, the angle between the emergent ray and the second refracting surface of the prism is

Moderate

A

0°
B

30°
C

45°
D

60°

Solution

In minimum deviation $i = e = 30^{\circ}$ so angle between emergent ray and second refracting surface is $90^{\circ} - 30^{\circ} = 60^{\circ}$

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