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