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electronvolt |
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electronvolt a unit of energy equal to the work done on an electron accelerated through a potential difference of 1 volt. 1 electronvolt is equivalent to 1.602 × 10--19 joule. Electronvolt A unit of energy used for convenience in atomic systems. Specifically, it is the change in energy of an electron, or of any particle having a charge numerically equal to that of an electron, when it is moved through a difference of potential of 1 mks volt. Its value (in mks units) is obtained from the equation W = qV, where W is energy in joules, q the charge in coulombs, and V the potential difference in volts. For a potential difference of 1 volt and the electronic charge of 1.602 × 10-19 coulomb, the electronvolt is 1.602 × 10-19 joule. See Electron, Ionization potential How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The energy gain of the electron beam is proportional to the acceleration voltage and is expressed in electron volts (eV) that represent the energy gained by a particle of unit charge by passing the potential difference of 1 V. 05 electron volts (eV), or about a 10-millionth the mass of the electron. The missing energy would amount to about 1 million electron volts, which is twice the rest mass of an electron, and would be a telltale signature of the mirror universe, Gninenko asserts. |
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