Electronvolt

  • in physics, an electronvolt (symbol ev, also written electron-volt and electron volt) is the amount of kinetic energy gained (or lost) by a single electron accelerating from rest through an electric potential difference of one volt in vacuum. when used as a unit of energy, the numerical value of 1 ev in joules (symbol j) is equivalent to the numerical value of the charge of an electron in coulombs (symbol c). under the 2019 redefinition of the si base units, this sets 1 ev equal to 1.602176634×10−19 j.

    historically, the electronvolt was devised as a standard unit of measure through its usefulness in electrostatic particle accelerator sciences, because a particle with electric charge q has an energy e = qv after passing through the potential v; if q is quoted in integer units of the elementary charge and the potential in volts, one gets an energy in ev.

    it is a common unit of energy within physics, widely used in solid state, atomic, nuclear, and particle physics. it is commonly used with the metric prefixes milli-, kilo-, mega-, giga-, tera-, peta- or exa- (mev, kev, mev, gev, tev, pev and eev respectively). in some older documents, and in the name bevatron, the symbol bev is used, which stands for billion (109) electronvolts; it is equivalent to the gev.

    measurement unit si value of unit
    energy ev 1.602176634×10−19 j
    mass ev/c2 1.782662×10−36 kg
    momentum ev/c 5.344286×10−28 kg·m/s
    temperature ev/kb 1.160451812×104 k
    time ħ/ev 6.582119×10−16 s
    distance ħc/ev 1.97327×10−7 m
  • definition
  • mass
  • momentum
  • distance
  • temperature
  • properties
  • scattering experiments
  • energy comparisons
  • see also
  • references
  • external links

In physics, an electronvolt (symbol eV, also written electron-volt and electron volt) is the amount of kinetic energy gained (or lost) by a single electron accelerating from rest through an electric potential difference of one volt in vacuum. When used as a unit of energy, the numerical value of 1 eV in joules (symbol J) is equivalent to the numerical value of the charge of an electron in coulombs (symbol C). Under the 2019 redefinition of the SI base units, this sets 1 eV equal to 1.602176634×10−19 J.

Historically, the electronvolt was devised as a standard unit of measure through its usefulness in electrostatic particle accelerator sciences, because a particle with electric charge q has an energy E = qV after passing through the potential V; if q is quoted in integer units of the elementary charge and the potential in volts, one gets an energy in eV.

It is a common unit of energy within physics, widely used in solid state, atomic, nuclear, and particle physics. It is commonly used with the metric prefixes milli-, kilo-, mega-, giga-, tera-, peta- or exa- (meV, keV, MeV, GeV, TeV, PeV and EeV respectively). In some older documents, and in the name Bevatron, the symbol BeV is used, which stands for billion (109) electronvolts; it is equivalent to the GeV.

Measurement Unit SI value of unit
Energy eV 1.602176634×10−19 J
Mass eV/c2 1.782662×10−36 kg
Momentum eV/c 5.344286×10−28 kg·m/s
Temperature eV/kB 1.160451812×104 K
Time ħ/eV 6.582119×10−16 s
Distance ħc/eV 1.97327×10−7 m

Other Languages
Afrikaans: Elektronvolt
العربية: إلكترون فولت
aragonés: Electronvolt
asturianu: Electrón-voltiu
azərbaycanca: Elektron volt
تۆرکجه: الکترون ولت
беларуская: Электронвольт
беларуская (тарашкевіца)‎: Электронвольт
български: Електронволт
Boarisch: Elektronenvolt
bosanski: Elektronvolt
brezhoneg: Elektron-volt
català: Electró-volt
čeština: Elektronvolt
español: Electronvoltio
Esperanto: Elektronvolto
euskara: Elektronvolt
français: Électronvolt
한국어: 전자볼트
hrvatski: Elektronvolt
Bahasa Indonesia: Elektronvolt
íslenska: Rafeindarvolt
italiano: Elettronvolt
latviešu: Elektronvolts
lietuvių: Elektronvoltas
Limburgs: Elektronvolt
magyar: Elektronvolt
македонски: Електронволт
Bahasa Melayu: Elektronvolt
Nederlands: Elektronvolt
日本語: 電子ボルト
Nordfriisk: Elektronenvolt
norsk nynorsk: Elektronvolt
oʻzbekcha/ўзбекча: Elektronvolt
Piemontèis: Eletronvòlt
Plattdüütsch: Elektronvolt
português: Elétron-volt
română: Electronvolt
sicilianu: Elettronvolt
Simple English: Electronvolt
slovenčina: Elektrónvolt
slovenščina: Elektronvolt
српски / srpski: Електронволт
srpskohrvatski / српскохрватски: Elektronvolt
svenska: Elektronvolt
Türkçe: Elektronvolt
українська: Електронвольт
Tiếng Việt: Electronvolt
吴语: 电子伏特
粵語: 電子伏特
中文: 電子伏特