The level of energy throughout the atoms circling the nucleus changes all the time. And then we're back on the subject of a photon because of the fact that the electron emits energy in the form of a photon. There is a different level of energy for each atom making it unique. They're like the laws of atoms. Electric and magnetic fields go along with light when it is in the form of a wave.
Electromagnetic waves are little force fields that stay around to charge particles.
Eletromagnetic waves vibrate. All natural sources of light have irregular light waves. O.K., now we're going to talk about wave length. A wave length is basically the distance between two wave peaks. They are about 0.4 ten-millionth of an inch long.