Photons are packets of energy that are emitted when an electron inside an atom moves to a lower energy level.

“it can go in one of two places if another atom hits it some of the energy of that electron can go to the kinetic energy of the other atom as it Carin off this happens a lot so it's a kinetic energy a fly by Looting of its energy all right so but occasionally it just sort of jostles it the electron d”