Q118 / 120 · VITEEE 2017 · Physics

A prism has a refracting angle of $60^{\circ} .$ When placed in the position of minimum deviation, it produces a deviation of $30^{\circ} .$ The angle of incidence is

A
$30^{\circ}$
Correct answer
B
$45^{\circ}$
C
$15^{\circ}$
D
$60^{\circ}$

Solution

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

Hence, the correct answer is option: 'B'.

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