The color wheel (Figure 24.24) is a convenient way to relate what colors of light are absorbed by a sample and the visible appearance of the sample. If all visible colors are absorbed by a sample, the sample appears black. If no colors are absorbed by the sample, the sample appears white. If the sample absorbs red, then what we see is green; such complementary colors are across the wheel from each other. Carrots appear orange because they contain a compound called carotene. Based on the color wheel, what is the possible wavelength range for the light absorbed by carotene?
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