| A | B |
|---|
| visible light | electromagnetic waves detected by human eye, 700- and 400-billionth of meter |
| opaque | materials only reflect or absorb light, no light passes through |
| translucent | transmit scattered light, not see clearly |
| transparent | transmit light-no scattering, see clearly |
| index of refraction | property of material--speed of light in material reduced compared to speed of light in vacuum |
| mirage | image of distant object produced by refraction of light through air layers of different densities |
| wavelength | distance between one point on wave and nearest same point |
| filter | transparent material that selectively transmit light --colored glasses |
| pigment | colored material used to change color of other substances |
| law of reflection | angle at which wave strikes surface is same as angle leaving |
