Question

what should be the min height of a plane mirror if a person desires to see his full image in it​

Answer 1

Answer:

The minimum height of the mirror should be one half the person's height.

Explanation:

It does not matter how far you are from the mirror. In order to see full image of a person, the minimum height 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 feet tall person, a 3 feet long mirror is required.