A person is 180 cm tall and has eyes 168 cm above the floor. Find the minimum mirror length in centimetres needed to see the complete body.
Physics · Geometrical optics · law of reflection and plane mirror
JEE Mains NEET

Question

A person is 180 cm tall and has eyes 168 cm above the floor. Find the minimum mirror length in centimetres needed to see the complete body.

G1 Physics · Accepted Answer

Minimum mirror length is half the person's height: 180/2=90 cm.