electromagnetic spectrum


Definition of electromagnetic spectrum

: the entire range of wavelengths or frequencies of electromagnetic radiation extending from gamma rays to the longest radio waves and including visible light

Examples of electromagnetic spectrum in a Sentence

Recent Examples on the Web

Silicon’s bandgap corresponds to infrared photons, which carry less energy than photons in the visible part of the electromagnetic spectrum. Daniel Oberhaus, WIRED, "New Designs Could Boost Solar Cells Beyond Their Limits," 11 July 2019 Instead, proof could arrive in the form of very distinct spectroscopic features—particularly an absorption line at 450 nanometers within the visible portion of the electromagnetic spectrum. Shannon Hall, Scientific American, "Water on Europa—with a Pinch of Salt," 12 June 2019 Multiple observatories previously aimed their eyes at the black hole and tried to untangle the engine behind its jet, studying it in wavelengths spanning the electromagnetic spectrum. National Geographic, "First-ever picture of a black hole unveiled," 10 Apr. 2019 Gamma rays fall at the very end of the electromagnetic spectrum. Quanta Magazine, "After Black Holes Collide, a Puzzling Flash," 2 Mar. 2016 At present, 99% of the 5G electromagnetic spectrum is in the hands of the U.S. government, which has not determined any procedure for allocating it to telecom companies. Nicholas Economides, Fortune, "Commentary: The T-Mobile-Sprint Merger Isn’t Really About 5G," 4 May 2018 In other words, radio waves and X-rays and visible light were all part of the same electromagnetic spectrum. Meg Neal, Popular Mechanics, "The Eternal Quest for Aether, the Cosmic Stuff That Never Was," 19 Oct. 2018 Included is support for both the sub-6GHz and mmWave portions of the electromagnetic spectrums, as well as legacy networks like, 2G, 3G, and 4G LTE — all in a single chip. Chaim Gartenberg, The Verge, "5G is almost here — here’s how everyone’s getting ready," 7 Sep. 2018 Today, there are observatories that cover the entire electromagnetic spectrum. Eileen Meyer, Smithsonian, "Big Data is Transforming How Astronomers Make Discoveries," 15 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'electromagnetic spectrum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of electromagnetic spectrum

1924, in the meaning defined above

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Last Updated

19 Jul 2019

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The first known use of electromagnetic spectrum was in 1924

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More Definitions for electromagnetic spectrum

electromagnetic spectrum


Medical Definition of electromagnetic spectrum

: the entire range of wavelengths or frequencies of electromagnetic radiation extending from gamma rays to the longest radio waves and including visible light

More from Merriam-Webster on electromagnetic spectrum

Britannica.com: Encyclopedia article about electromagnetic spectrum

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