electron volt

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See also: electronvolt, électronvolt, and électron-volt

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Noun

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electron volt (plural electron volts) (abbreviated eV)

  1. (physics) A unit for measuring the energy of subatomic particles; the energy equal to that attained by an electron moving through a potential difference of one volt. Equivalent to 1.6022 x 10-19 joules.
    • 2011, Brian Cox, Jeff Forshaw, The Quantum Universe, Allen Lane, page 158n:
      To get a feel for the size, the energy required to completely liberate an electron from the ground state of a hydrogen atom is 13.6 electron volts.

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