| A | B |
| white light | light that contains all colors of the spectrum |
| spectrum | the range of colors that make up white light |
| dispersion | the spreading out of light into the different colors that make up the spectrum |
| prism | a transparent glass object with triangular ends, used for separating white light into all the colors of the spectrum as it passes through the prism |
| primary colors / colours | red, blue and green; these colors cannot be produced by mixing other colored lights together; a.k.a. additive colors |
| secondary colors / colours | yellow, magenta and cyan are the secondary colors of light; they are produced by adding equal amounts of 2 primary colors; a.k.a. subtractive colors |
| dye | a substance that adds color to an object |
| pigment | a colored substance used to dye things |
| absorb | to soak up |
| color/colour filter | a piece of colored glass or plastic that lets only certain colors of light pass through it |
| *color/colour blind | inability to perceive differences between some colors |