Question

A boy is standing in front of a plane mirror at a distance of 3 m from it. Then the distance between the boy and his image is:

• A. 3 m
• B. 6 m
• C. 1.5 m
• D. 9 m

Answer 1

The correct option is B

6 m

In case of plane mirror, the distance between image and mirror is equal to the distance between object and mirror but the image and object are in opposite direction.
Distance of boy from mirror, $u=3m$
Hence, distance of image from mirror, $v=3m$

$\therefore$ Distance between the boy and his image is the sum of the distance of the boy from the mirror and the distance of the image from mirror. It is hence:
$d=u+v$
$d=3+3=6m$