First slide

Plane mirror

Question

To get three images of a single object, one should have two plane mirrors at an angle of

Moderate

A

30°
B

60°
C

90°
D

150°

Solution

$n = (\frac{360}{θ} - 1) \Rightarrow 3 = (\frac{360}{θ} - 1) \Rightarrow θ = 90^{\circ}$

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