First slide

Prism

Question

A ray incident a 15° on one refracting surface of a prism of angle 60°, suffers a deviation of 55°. What is the angle of emergence

Moderate

A

$95^{\circ}$
B

$45^{\circ}$
C

$30^{\circ}$
D

100°

Solution

Using
$δ = i_{1} + i_{2} - A \Rightarrow 55 = 15 + i_{2} - 60 \Rightarrow i_{2} = 100^{\circ}$

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