| A | B |
| absorb | to keep from passing through; to "swallow up" or take in |
| additive color mixing | the combining of different colors of light, so-called because each new color adds to the total amount of light present. The result of combining all colors additively is white. |
| afterimage | a phantom image that remains in the visual field after the visual stimulus that caused it (such as a flash of light) has been removed. The color of the phantom image is complementary to the color of the visual stimulus |
| binocular vision | sight through both eyes |
| chromatogram | the image (in this case, bands of color on a strip of absorbent paper) formed by the seperation of substances through chromatography |
| chromatography | a scientific technique for separating substances. Paper chromatography separates solutions into bands of color along a strip of absorbent paper |
| complementary color | the color seen as an afterimage of another color; complementary colors are opposite one another on the color wheel |
| concentration | the amount of something in a given space |
| continuous-tone image | an image produced by the photographic process; consists of gradations of tone rather than patterns of dots |
| filter | a substance or device that prevents certain things from passing while letting others through |
| halftone image | an image produced from patterns of small dots that, when viewed from a distance, create the illusion of continuous tone. |