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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 [i′lek‚trän ‚vōlt] (physics) A unit of energy which is equal to the energy acquired by an electron when it passes through a potential difference of 1 volt in a vacuum; it is equal to (1.60217646±0.00000006) × 10-19volt. Abbreviated eV. 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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2 billion electronvolts, about six times that of a proton and very close to theorists' predictions. Gillow's team, funded by the Department of Energy Office of Science, uses "soft" X-rays (up to 800 electronvolts, a relatively small amount of energy) to study the chemical structure of organic compounds. If the Higgs particle has a mass at the high end of its predicted range, about 115 billion to 200 billion electronvolts, it should be easily detected, its decay products standing out dramatically against the background of particle debris from other processes. |
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