gamma ray

noun

Definition of gamma ray

: a photon emitted spontaneously by a radioactive substance also : a photon of higher energy than that of an X-ray

Examples of gamma ray in a Sentence

Recent Examples on the Web

Creating gamma ray photons obviously takes a lot of energy. Chris Lee, Ars Technica, "Gamma ray evidence for dark matter outshone by a flock of pulsars," 10 Aug. 2018 Telescopes capable of examining all parts of the spectrum, from gamma rays to radio waves, were brought into play. The Economist, "Gravitational astronomy proves its maturity," 22 Aug. 2019 So, from the gamma ray telescope's perspective, the moon becomes a nifty detector for cosmic ray particles. Lauren Kent, CNN, "Why the moon glows brighter than the sun in these new NASA images," 16 Aug. 2019 Spitzer detects infrared light, Hubble captures visible and UV light, Compton was designed for gamma rays, and Chandra sees X-rays. Ashley Strickland, CNN, "Like Mercury, a nearby 'lava world' is probably lacking an atmosphere," 19 Aug. 2019 These cosmic rays tend to be gamma rays generated by the fusion reactions in the sun. Avery Thompson, Popular Mechanics, "Secret Room in Great Pyramid Discovered Thanks to Cosmic Rays From the Sun," 2 Nov. 2017 Spitzer detects infrared light, while Hubble captures visible and UV light, Compton was designed for gamma rays and Chandra sees X-rays. Ashley Strickland, CNN, "This sideways galaxy looks just like a lightsaber," 9 Aug. 2019 The resulting gamma rays could fuel a fusion reaction that then propels the spacecraft. Sarah Scoles, Scientific American, "The Good Kind of Crazy: The Quest for Exotic Propulsion," 29 July 2019 Yet dark matter wasn’t the only thing that could be generating the excess gamma rays. Quanta Magazine, "Dark Matter Gets a Reprieve in New Analysis," 29 Apr. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'gamma ray.' 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 gamma ray

1903, in the meaning defined above

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Statistics for gamma ray

Last Updated

8 Oct 2019

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Time Traveler for gamma ray

The first known use of gamma ray was in 1903

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More Definitions for gamma ray

gamma ray

noun
gam·​ma ray | \ ˈga-mə-\

Kids Definition of gamma ray

: a ray that is like an X-ray but of higher energy and that is given off especially by a radioactive substance

gamma ray

noun

Medical Definition of gamma ray

: a photon emitted spontaneously by a radioactive substance also : a high-energy photon usually used in plural

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More from Merriam-Webster on gamma ray

Rhyming Dictionary: Words that rhyme with gamma ray

Spanish Central: Translation of gamma ray

Nglish: Translation of gamma ray for Spanish Speakers

Britannica.com: Encyclopedia article about gamma ray

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