First slide

Prism

Question

A ray passes through a prism of angle 60° in minimum deviation position and suffers a deviation of 30°. What is the angle of incidence on the prism?

Moderate

A

30°
B

45°
C

60°
D

90°

Solution

$i = \frac{A + δ_{m}}{2} = \frac{60^{\circ} + 30^{\circ}}{2} = 45^{\circ}$

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