Question

If two plane mirrors are kept inclined to each other at an angle of 60 degrees, the number of images of the object formed is:

• A. 4
• B. 5
• C. 6
• D. 7

Answer 1

The correct option is B

5

Whenever two plane mirrors are kept inclined to each other, multiple reflections takes place and multiple images are formed.

If the angle of inclination between two plane mirrors is '$x$' degrees, the number of images formed, '$\text{n}$' is given by,

$\text{n}=\frac{360}{\text{x}}-1$
In this case, $\text{x}$ = 60 degrees.
$\text{n}=\frac{360}{\text{60}}-1$
$\text{n}=\text{6}-1$
$\text{n}=\text{5}$

Thus, the number images formed is 5.