Electromagnetic spectrum definition |Dictionary.com

Electromagnetic Spectrum

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5 dictionary results for: Electromagnetic spectrum

Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

electromagnetic spectrum

–noun

the entire spectrum, considered as a continuum, of all kinds of electric, magnetic, and visible radiation, from gamma rays having a wavelength of 0.001 angstrom to long waves having a wavelength of more than 1 million km.

[Origin: 1935–40

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

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American Heritage Dictionary - Cite This Source - Share This

electromagnetic spectrum

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n. The entire range of radiation extending in frequency from approximately 10²³ hertz to 0 hertz or, in corresponding wavelengths, from 10^-13 centimeter to infinity and including, in order of decreasing frequency, cosmic-ray photons, gamma rays, x-rays, ultraviolet radiation, visible light, infrared radiation, microwaves, and radio waves.

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The American Heritage® Dictionary of the English Language, Fourth Edition
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WordNet - Cite This Source - Share This

electromagnetic spectrum
noun
the entire frequency range of electromagnetic waves

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The American Heritage Science Dictionary - Cite This Source - Share This

electromagnetic spectrum

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The entire range of electromagnetic radiation. At one end of the spectrum are gamma rays, which have the shortest wavelengths and high frequencies. At the other end are radio waves, which have the longest wavelengths and low frequencies. Visible light is near the center of the spectrum.

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American Heritage New Dictionary of Cultural Literacy, Third Edition - Cite This Source - Share This
electromagnetic spectrum

The family of electromagnetic waves. The electromagnetic spectrum, starting from the waves with the longest wavelengths (and least energy), consists of radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, x-rays, and gamma radiation. Members of the family differ from one another only in their wavelength, or frequency. For example, the wavelength of blue light is roughly half that of red light, but the waves corresponding to the two colors are otherwise identical.