| A | B |
|---|
| transfer of energy by electromagnetic waves | radiation |
| wavelength longer than visible light | infrared radiation |
| particles of light | photons |
| have long wavelengths and low frequencies | radio waves |
| radio waves with the highest frequency and energy | microwaves |
| have shorter wavelength and higher frequency than ultraviolet waves | x rays |
| materials which absorb or reflect all light | opaque |
| allows light to pass through it | transparent |
