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electron volt
[ ih-lek-tron-vohlt ]
noun
, Physics.
- a unit of energy, equal to the energy acquired by an electron accelerating through a potential difference of one volt and equivalent to 1.602 × 10 −19 joules. : eV, ev
electron volt
- A unit used to measure the energy of subatomic particles. One electron volt is defined as the energy needed to move an electron (which has an electric charge equal to −1) across an electric potential of one volt.
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Word History and Origins
Origin of electron volt1
First recorded in 1925–30
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Example Sentences
For comparison, the super-energetic protons in the largest particle accelerator on Earth — the Large Hadron Collider — only reach trillions of electron volts.
For comparison, protons in the largest accelerator on Earth, the Large Hadron Collider, reach mere trillions of electron volts.
From Science News
A search for possible sources of the 38 highest-energy gamma rays, above 398 trillion electron volts, came up empty, supporting the idea that the gamma rays came from cosmic rays that had wandered about the galaxy.
From Science News
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