Unformatted text preview: well known to art students. A simple color wheel is shown in Figure 2.
Complementary colors are opposite each other on the color wheel.
For example, if red is absorbed and all
other colors reflected, we may see the complementary color of red, which is green. It is interesting to note that
the average human eye can see up to 4000 shades of red but only about 400 shades of blue. In fact, the science
of color perception and its application in color matching technology for paints, inks, and dyes is a fascinating area
We can measure the light being absorbed and materials can be characterized by their absorption
spectrum. An absorption spectrum is often shown as a graphical plot of the amount of light absorbed versus
wavelength. Most materials absorb light over a broad range of wavelengths.
While a material's apparent color
is most often the result of absorption of light, color can also arise from e mis s ion of light. Excited states formed
from energy absorption are short- lived because the electron seeks the position of lowest potential energy and the
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This document was uploaded on 01/22/2014.
- Spring '14