Prove that the length of a plane mirror should be half the height of the person to see its complete image.

Height of a man is 1.4 m what should be the height of image of see his complete height?

Prove that focal length of a spherical mirror is equal to half the radius of its curvature.

Image formed by a plane mirror is

A man is standing in a room and a plane mirror is fixed on the wall in fornt of him.The height of the wall is H .Man has to see the complete image of wall behing him at a time When the man is standing at the midddle of the room i.e at position 2 ,the minimum length of the mirror required is

A man is standing in a room and a plane mirror is fixed on the wall in fornt of him.The height of the wall is H .Man has to see the complete image of wall behing him at a time When the man is at position 3 ,the minimum length of the mirror required is