Question

Two plane mirrors are placed at some angle. There are five images formed, when an object is placed symmetrically between them. Find the angle between the mirrors.

• A. $60^\circ $
• B. $45^\circ $
• C. $30^\circ $
• D. $90^\circ $

Answer 1

Answer: (A)

Number of images $=\frac{360 ^\circ }{\theta }-1$
$5=\frac{360 ^\circ }{\theta }-1$
$\theta =60^\circ $