Critical Thinking! Although sunlight appears white, it is actually made up of many different colors of light: red, orange, yellow, green, blue and violet. Design an experiment to determine if chlorophyll can use all the colors of sunlight or if only some colors are absorbed and used by chlorophyll.

Pure pigments absorb a single frequency or color of light. The color of light absorbed by a pigment is merely the complementary color of that pigment. Thus, pure blue pigments absorb yellow light (which can be thought of as a combination of red and green light). Pure yellow pigments absorb blue light.