This can be easily seen by shining a flashlight in the dark. Light rays can bounce off materials, like walls, to provide light to other areas like around corners.
Light is a form of energy.
If you hold your hand near a light you will feel it get hot. Some light sources can get so hot that they can burn you. Some objects, like windows, are transparent allowing light to pass through them. Other objects are opaque, blocking the light from going through them. If you hold your hand underneath a light, you will see a shadow of your hand.