| A | B |
|---|
| radiant energy | Energy that travels as waves and can move through empty space. |
| thermal energy | Energy of the movements of atoms and molecules. |
| wavelength | The distance from a point on one wave to the same point on the next wave. |
| frequency | The number of waves passing a point in one second. |
| vibration | Rapid back and forth motion of air or other matter. |
| radiation | Energy transmitted as rays, waves. |
| conduction | The transmission of energy through a medium, especially the transmission of electric charge or heat. |
| convection | The transfer of heat by the circulation or movement of the heated parts of a liquid or gas. |
| reflection | The return of light, heat, sound, etc., after striking a surface. |
| refraction | The change in direction of a wave when passing from one medium to another. |
