Optics is the study of the properties and behavior of light. In this section you can learn about everything from holograms to lasers and lenses.



Luminescence, the emission of light from causes other than high temperature. (The emission of light due to heat is called incandescence.) Luminescence may occur in a solid, liquid, or gas.

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  • Yellow

    Yellow, one of the pigment primary colors. Yellow occurs between green and orange in the solar spectrum. See more »

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