electron volt


Definition of electron volt

: a unit of energy equal to the energy gained by an electron in passing from a point of low potential to a point one volt higher in potential : 1.60 × 10−19 joule

Examples of electron volt in a Sentence

Recent Examples on the Web Observations of nearby galaxies and the center of our own Milky Way revealed a faint glow of x-rays with a specific energy, 3.5 kilo-electron volts (keV). Adrian Cho, Science | AAAS, "Physicists brawl over new dark matter claim," 26 Mar. 2020 As long as the production was reasonably inefficient, and the mass was about 17MeV (million electron volts), then the data was beautifully explained. Chris Lee, Ars Technica, "New boson appears in nuclear decay, breaks standard model," 20 Dec. 2019 The lower bound is 0.02 eV (electron volts); neutrinos can't have a lower mass than that. Jennifer Ouellette, Ars Technica, "Weighing in: Physicists cut upper limit on neutrino’s mass in half," 19 Sep. 2019 Using plasma waves, the BELLA team was able to generate electron beams with energies up to 7.8 billion electron volts (GeV) in an 8-inch-long plasma. David Grossman, Popular Mechanics, "Scientists Are Trying To Shrink Particle Accelerators," 21 Oct. 2019 But at less than 1 electron volt, the putative MiniBooNE sterile neutrino lacks the heft for these other purposes. Quanta Magazine, "Evidence Found for a New Fundamental Particle," 1 June 2018 This slow-moving X boson, which has a mass of 16.7 million electron volts (MeV), splits into an electron-positron pair. Quanta Magazine, "Evidence of a ‘Fifth Force’ Faces Scrutiny," 7 June 2016 Ultrahigh-energy cosmic rays surpass 1 exa-electron volt (EeV). Quanta Magazine, "The Particle That Broke a Cosmic Speed Limit," 14 May 2015 The neutrino that set off the alarm in 2017 had an energy of some 300 trillion electron volts, by the units of energy and mass that physicists prefer. Dennis Overbye, New York Times, "It Came From a Black Hole, and Landed in Antarctica," 12 July 2018

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

1930, in the meaning defined above

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The first known use of electron volt was in 1930

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Cite this Entry

“Electron volt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electron%20volt. Accessed 15 May. 2021.

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electron volt


Medical Definition of electron volt

: a unit of energy equal to the energy gained by an electron in passing from a point of low potential to a point one volt higher in potential : 1.60 × 10−19 joule

More from Merriam-Webster on electron volt

Britannica.com: Encyclopedia article about electron volt

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