What happens when light falls on an object?

When light falls on an object, it may be transmitted (allowed to pass through it without interaction), or reflected (the ray is turned back without allowing it to pass through), or it is absorbed (used up completely for any one or more of the transitions listed later) or it is scattered (reflected in different directions). Usually, all of these may happen together. 

Although invisible, other electromagnetic radiations also behave like visible light. When an electromagnetic radiation of a particular energy is absorbed by a molecule, it is used for executing various kinds of motions by the molecule.