Question

31.
A man is standing exactly at midway between a wall and a mirror and he wants to see the full
height of the wall (behind him) in a plane mirror (in front of him). If the height of wall is H, then
the minimum length of mirror should be
​

Answer 1

Answer:

the answer for your question is H/2

Answer 2

$\dfrac{H}{2}$

Explanation:

Given condition: A man is standing exactly at midway between a wall and a mirror.

Height of wall = H

∴ To see the full height of the wall (behind him) in a plane mirror (in front of him)

To find;

Minimum length of mirror = $\frac{H}{2}$

This is because in the minimum length less than half of the wall he will not be able to see the wall height.