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
• references

meV, keV, MeV, GeV, TeV and PeV redirect here. For other uses, see MEV, KEV, GEV, TEV and PEV. 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 Contents 1 Definition 2 Mass 3 Momentum 4 Distance 5 Temperature 6 Properties 7 Scattering experiments 8 Energy comparisons 8.1 Per mole 9 See also 10 References 11 External links

Other Languages
Afrikaans: Elektronvolt
العربية: إلكترون فولت
aragonés: Electronvolt
asturianu: Electrón-voltiu
azərbaycanca: Elektron volt
تۆرکجه: الکترون ولت
беларуская: Электронвольт
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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