Question

a person is 1.4 m tall what minimum size of a plane mirror does he or she needs to see his or her full reflection​

Answer 1

Answer:

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 1.4 m tall person, a 0.7 m long mirror is required.

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Answer 2

Answer:

The minimum size of your mirror should be half of your height.

Minimum size of mirror is 0.7

Explanation:

A person is 1.4 m tall ,then the minimum size of a plane mirror must be 1.4/2=.7 m so that he or she needs to see his or her full reflection.

In reflection it is known that,

The Angle  of falling light on the object=The angle of reflection.

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