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light

electromagnetic radiation at or near visible wavelengths

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About light

Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometers (nm), corresponding to frequencies of 750–420 terahertz. The visible band sits adjacent to the infrared and the ultraviolet, called collectively optical radiation.

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Facts from Wikidata (CC0). Image by Limonc via Wikimedia Commons (Public domain).

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