Several terms redirect here. For other uses, see MEV (disambiguation), KEV (disambiguation), GEV (disambiguation), TEV (disambiguation), and PEV (disambiguation).
In physics, an electronvolt (symbol eV, also written electron-volt and electron volt) is the measure of an amount of kinetic energy gained 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 the exact value 1.602176634×10−19 J.[1]
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 gains an energy E = qV after passing through a voltage of V. Since q must be an integer multiple of the elementary charge e for any isolated particle, the gained energy in units of electronvolts conveniently equals that integer times the voltage.
^"2018 CODATA Value: electron volt". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2019-05-20.
In physics, an electronvolt (symbol eV, also written electron-volt and electron volt) is the measure of an amount of kinetic energy gained by a single...
unit. Among the units commonly used to denote photon energy are the electronvolt (eV) and the joule (as well as its multiples, such as the microjoule)...
{\displaystyle h} = 6.62607015×10−34 J⋅Hz−1. It is often used with units of electronvolt (eV), which corresponds to the SI unit per elementary charge. Planck's...
steradian (sr). Some other units such as the hour, litre, tonne, bar, and electronvolt are not SI units, but are widely used in conjunction with SI units. Until...
joules per coulomb (energy per charge), which is also equivalent to electronvolts per elementary charge: V = A ⋅ Ω = Wb s = W A = J C = eV e . {\displaystyle...
customary to express temperature as energy in a unit related to the electronvolt or kiloelectronvolt (eV/kB or keV/kB). The corresponding energy, which...
7 million Kelvin photon temperature gives a typical photon energy of 250 electronvolt, thereby setting a typical mass scale for warm dark matter: particles...
used in atomic physics, particle physics and high energy physics is the electronvolt (eV). One eV is equivalent to 1.602176634×10−19 J. In spectroscopy the...
units include: the tonne (t) (or "metric ton"), equal to 1000 kg the electronvolt (eV), a unit of energy, used to express mass in units of eV/c2 through...
dissociation energies, Ed, of the A–B, A–A and B–B bonds are expressed in electronvolts, the factor (eV)−1⁄2 being included to ensure a dimensionless result...
released by detonating one million tons of trinitrotoluene, TNT) and the electronvolt. To reduce the incidence of retail fraud, many national statutes have...
different energies. The energy of ionizing radiation starts between 10 electronvolts (eV) and 33 eV.[citation needed] Typical ionizing subatomic particles...
US customary unit is the foot pound. Other energy units such as the electronvolt, food calorie or thermodynamic kcal (based on the temperature change...
Vermessungswesen, the Austrian agency for national mapping and metronomy Billion-electronvolt (BeV), equivalent to the SI term GeV (gigaelectronvolt) BEVS may stand...
internal combustion engine Electric car, a type of electric vehicle Electronvolt (eV), in physics, a unit of energy Estradiol valerate, an estrogen medication...
102 mg/crystal).[citation needed] Zeptojoule 160 zeptojoule is about one electronvolt.[citation needed] The minimal energy needed to change a bit of data in...
and the unit of charge e lost its name. However, the unit of energy electronvolt (eV) is a remnant of the fact that the elementary charge was once called...
computational chemistry: for experimental measurements at the atomic scale, the electronvolt (eV) or the reciprocal centimetre (cm−1) are much more widely used. E...
Stoney unit of length lS 1.381×10−35 Quantum chromodynamics (QCD) unit of length lQCD 2.103×10−16 Natural units based on the electronvolt 1 eV−1 1.97×10−7...
energy ions leaving at tens to hundreds of electronvolts. Alpha particles leaving at millions of electronvolts. Electrons leaving at high energy. Light...
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