Question

the height of a person is 180 cm. How long will the plane mirror is required for him to see his full image? ​

Answer 1

Answer:

it's common bcz the plane mirror show us the exact size of object

so 180cm long required plane mirror

Answer 2

Given : Height of person = 180 cm.

To Find : Length of plane mirror required see his full image

Solution :

Minimum length of plane mirror required in such cases doesn't depend on distance of object from the mirror and is always equal to half of height of object.

Length of plane mirror = height of person/2

Length of plane mirror = $\[\frac{{180cm}}{2}\]$ =90cm

Hence, Length of plane mirror required see his full image is 90 cm.