Question

If the height of a person is 120 cm, then what must be the minimum height of a
plane mirror in order to see the full image of the person?​

Answer 1

Answer:

Minimum height of mirror should be half of height of person in order to see full person in mirror

so ; mirror would be of 60 cm.

Answer 2

A

3 feet

It does not matter how far you are from the mirror. In order to see full image of a person, the minimum size of the mirror should be one half the person's height. This is so because, in reflection, the angle of incidence is equal to angle of reflection. So, to see the image of a 6 ft tall person, a 3 ft long mirror is required.