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Visible spectrum
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==See also== {{Wikisource|Littell's Living Age/Volume 145/Issue 1869/Definition of the Color Indigo|Definition of the Color Indigo}} {{Commons category|Visible spectrum}} * [[Cosmic ray visual phenomena]] * [[Electromagnetic absorption by water]] * [[High-energy visible light]] * [[Two-photon absorption]] - A method for seeing outside the visible spectrum {{clear}}
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