| A | B |
| electromagnetic waves | transverse waves that can travel through a vacuum |
| photons | electromagnetic waves that travel as tiny packets or bundles of energy |
| radio waves | longest wavelength |
| infrared rays | electromagnetic waves with wavelengths between visible light and radio waves |
| utraviolet rays | electromagnetic waves with wavelenghths shorter than visible light |
| X ray | waves with wavelenghs shorter than ultraviolet rays |
| gamma wave | have the shortest wavelength |
| flourescent material | absorb ultraviolet rays, change energy into visible light |
| mission spectrum | wavelegth that give off a single atom |
| absorption spectrum | radiation pattern absorbed by single atom |