Question

Two mirrors M1 and M2 are placed at right angle to each others as shown. The total number of images of an object 'O' that can be seen are

• A. Two
• B. Three
• C. Four
• D. Infinite

Answer 1

The correct option is B Three

When two plane mirrors are inclined to each other at an angle $\theta$ then no. of images formed,

is given by, $n=(\frac{{360}^{\circ }}{\theta }-1)$

now, if $\frac{{360}^{\circ }}{\theta }$ is an even integer,

Number of image $=\frac{{360}^{\circ }}{{90}^{\circ }}-1=4-1=3$