| A | B |
|---|
| Diffuse | Reflected in many directions |
| Index of refraction | Ratio of light speeds in different medium |
| Rainbow | Caused by dispersion |
| Critical angle | Beyond this angle light is totally internally reflected |
| Converging lens | Thick in the middle |
| Diverging lens | Thin in the middle |
| Aberration | Distortion of an image produces by a lens |
| Diffraction | Bending of light by means other than reflection or refraction |
| Interference | Produces fringes in light |
| Ho;ogram | Two dimensional interference pattern |
| Polorization | Alignment of E&M radiation |
| Emission spectra | Produces bright lines on a screen |
| Absorption spectra | Produces dark lines on a screen |
| Incandescence | Light produced by high temperatures |
| Spectroscope | Separates light into component frequencies |
| Fluorescence | Caused by light absorbed at high frequency and emitted at a lower frequency |
| Phosphorescence | Provides an after-glow of light |
