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spectrum
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A horizontal gradient bar displays the visible light spectrum from violet to red, labeled with corresponding frequency in terahertz, wavelength in nanometers, and photon energy in electron volts. Spectrum of a lightning flash. prism spreading light solar spectrum A horizontal diagram of the visible solar spectrum displays colors from violet to red, labeled with wavelength values in nanometers and prominent Fraunhofer lines marking where elements like hydrogen, magnesium, and sodium absorb light. A diagram of Newton's prism experiment shows a beam of white sunlight entering a glass prism and emerging as a spread of colors labeled red, orange, yellow, green, blue, indigo, and violet. Diagram of the electromagnetic spectrum showing frequency, wavelength, and photon energy scales, with labeled regions for gamma rays, X-rays, ultraviolet, infrared, radar, microwaves, television, and radio waves. The visible light portion is highlighted and enlarged to the right, displaying its color range from violet to red.
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spectrum: References & Edit History

Article Contributors

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  • The Editors of Encyclopaedia Britannica
    Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

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Article History

Type Description Contributor Date
Modified title of Web site: Biology LibreTexts - Spectrums of Light. Feb 21, 2025
Add new Web site: UNSW Sydney - What is a Sound Spectrum? Nov 08, 2024
Add new Web site: Mustansiriyah University - Types of Spectra. Aug 26, 2024
Add new Web site: Biology LibreTexts - Spectrums of Light. Dec 12, 2023
Article revised and updated. Apr 21, 2022
Article added to new online database. Jul 20, 1998
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