| A | B |
|---|
| energy | ability to do work |
| visible light | type of E-M radiation that you can see |
| electromagnetic radiation | energy given off by the sun |
| wave | vibration of energy as it travels through space, how light travels |
| vacuum | a space empty of matter |
| crest | high point of a wave |
| trough | low point of a wave |
| wavelength | the length of a wave from one crest toanother |
| hertz | measurement of a wave frequency |
| convex mirror | mirror that curves outwards |
| concave mirror | miror that curves inward |
| refraction | bending of light as it passes from one material to another |
| reflection | bouncing back of light from a surface |
