| A | B |
|---|
| diffraction | the bending of light around the edge of an object |
| electromagnetic spectrum | all energy waves that travel at the speed of light in a vacuum; includes radio, infrared, visible, ultraviolet, X rays, and gamma rays |
| frequency | the number of vibrations or waves in a given amount of time |
| amplitude | the distance in a wave from the resting position to the top of the crest or the bottom of the trough |
| opaque | not allowing any light to pass through |
| reflection | the bouncing of light off a surface |
| refraction | the bending of light as it passes from one material to another |
| translucent | allowing some light to pass through |
| transparent | allowing almost all light to pass through |
| wave | a disturbance that carries energy through matter or space |
| wavelength | the distance from the middle of the crest of one wave to the middle of the crest of the next wave |
| transverse waves | waves that go up and down or side to side |
| longitudinal waves | waves that go back and forth |
