Question

The total number of images formed by two plane mirrors inclined at an angle of ${12}^{\circ }$ (object is placed symmetrically between them) is

• A. 25
• B. 27
• C. 30
• D. 29

Answer 1

The correct option is D 29

$n=\frac{360}{\theta }$
if n is even, then no. of images = n -1
$n=\frac{{360}^{\circ }}{{12}^{\circ }}=30$
no. of images = 30-1 = 29