| A | B |
| Diffraction | breaking white light into its eight component colors, the visible spectrum |
| Light | an energy form which travels in waves. Humans are able to visually observe the visible spectrum |
| Opaque | medium that transmits no light (all is absorbed or reflected) |
| Prism | optical tool used to diffract light |
| Ray | the straight pathways in which light travels |
| Reflect | when light bounces off an object |
| Refract | when a light ray is bent as it passes through different media |
| Transmit | to pass through an object |
| Transparent | an object that allows light to pass through |
| Translucent | an object that allows some light to pass through it but not all, and it will cast a faint shadow |
| Visible spectrum | the colors of light that can be seen with the human eye |