For a concave mirror with the focal length of 3.6 cm, where should a 4.0-cm tall object be placed with respect to the mirror so that it produces a 7.0-cm tall virtual image located 11 cm from the
mirror?

Did you ever figue this

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.

As newton's first law states a object in motion stays in motion