electronvolt

(eV)
   1. a unit of work or energy used in physics. One electronvolt is the work required to move an electron through a potential difference of one volt.
   The size of the electronvolt must be determined experimentally; the currently accepted value (1998) is 160.217 646 2 x 10-21 joule, or 1.602 176 462 x 10-12 erg. This unit is accepted for use with SI units. The official spelling is electronvolt (one word) rather than electron volt.
   2. a unit of mass used in particle physics. Mass and energy are related by Einstein's famous equation, E = mc2. The constant c is the speed of light, 299.79 x 106 m/sec. An energy of 1 electronvolt is therefore equivalent to a mass of about 1.782 662 x 10-33 gram, or about 1.073 544 x 10-9 atomic mass unit. This is such a small unit that most particle masses are measured in MeV or GeV.

Dictionary of units of measurement. 2015.

Look at other dictionaries:

  • électronvolt — [ elɛktrɔ̃vɔlt ] n. m. • 1938; de électron et volt ♦ Unité de mesure d énergie (symb.eV) valant 1,6.10 19 joule, plus particulièrement utilisée en physique des particules et en électronique. ● électronvolt nom masculin Unité d énergie (symbole… …   Encyclopédie Universelle

  • electronvolt — ELECTRONVÓLT s.m. Unitate de măsură a energiei egală cu energia câştigată de un electron accelerat la o diferenţă de potenţial de un volt. (din fr. électron volt) Trimis de tavi, 27.04.2004. Sursa: MDN  ELECTRON VOLT, electron volţi, s.m.… …   Dicționar Român

  • Electronvolt — meV, keV, MeV, GeV, TeV, PeV, and BeV redirect here. For other uses, see MEV, KEV, GEV, TEV, PEV, and BEV. In physics, the electron volt (symbol eV; also written electronvolt[1][2]) is a unit of energy equal to approximately 1.602×10−19joule… …   Wikipedia

  • Electronvolt — Électron volt En physique, l électronvolt (symbole eV) est une unité de mesure d énergie. Sa valeur est définie comme étant l énergie cinétique d un électron accéléré depuis le repos par une différence de potentiel d un volt. Un électron volt est …   Wikipédia en Français

  • electronvolt — {{#}}{{LM E44126}}{{〓}} {{[}}electronvolt{{]}} ‹e·lec·tron·volt› {{◆}}(pl. electronvolts){{◇}} {{《}}▍ s.m.{{》}} → {{↑}}electronvoltio{{↓}}. {{★}}{{\}}ORTOGRAFÍA:{{/}} Es la denominación internacional del electronvoltio …   Diccionario de uso del español actual con sinónimos y antónimos

  • electronvolt — elektronvoltas statusas T sritis Standartizacija ir metrologija apibrėžtis Jonizuojančiosios spinduliuotės dalelės energijos matavimo vienetas. atitikmenys: angl. electronvolt vok. Elektronenvolt, n rus. электронвольт, m pranc. électron volt, m …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • electronvolt — elektronvoltas statusas T sritis Standartizacija ir metrologija apibrėžtis Nesisteminis darbo ir energijos matavimo vienetas. Vienas elektronvoltas yra energija, kurią įgyja elektronas vakuume elektriniame lauke pralėkęs vieno volto potencialų… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • electronvolt — elektronvoltas statusas T sritis fizika atitikmenys: angl. electronvolt vok. Elektronenvolt, n rus. электронвольт, m pranc. électron volt, m …   Fizikos terminų žodynas

  • Electronvolt — …   Википедия

  • electronvolt — electron volt n. Abbr. eV A unit of energy equal to the energy acquired by an electron falling through a potential difference of one volt, approximately 1.602 × 10 19 joules. See table at measurement. * * * …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.