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 ...

The electromagnetic spectrum consists of a group of radiations that all travel at the speed of light (\(3\times 10^{8},m\,s^{-1}\)). In the middle of the EM spectrum is the visible spectrum ...

We say that it becomes ‘excited’. An electron can be excited when its absorbs energy from electromagnetic radiation. Different changes in energy level need different frequencies of ...