A pigment takes incoming light, absorbs certain wavelengths, and reflects the rest so you see a particular color. Pigments change the color of reflected light (or transmitted light, which we’ll get to soon when we cover colored filters.)

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Pigments are used in fabrics, paints, ink, make-up, food, and many other materials. A pigment is different from a dye in that a dye is usually a liquid or can be made into a liquid by mixing in solution, whereas a pigment is a powder.

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