The electromagnetic spectrum consists of a group ... There are many other parts of the EM spectrum that we cannot see. The diagram below illustrates these parts.

Electromagnetic radiation is the general term for the more familiar light ... For example, the radio emission from a quasar would span most of the diagram above and the amount of power would change ...

Light is a type of electromagnetic radiation that can be detected by ... Add an arrow to show the direction the light is travelling. A ray diagram shows how light travels, including what happens ...