Electronvolt

The electron-volt or electron volt, symbol eV, is used to measure energy. It is defined as the amount of energy an electron gains after being accelerated by 1 v…

Electronvolt

The electron-volt or electron volt, symbol eV, is used to measure energy. It is defined as the amount of energy an electron gains after being accelerated by 1 volt of electricity. Joule is used in the International System of Units for energy, but the electronvolt is often used for a tiny amount of energy, or quantum, such as that carried by a single subatomic particle.

To convert joules into electron-volts, divide joules by the charge of an electron, which is about 1.602×10−19 coulomb.

E.g. 5 J = 5/1.602×10−19
5 J = 3.121×10+19 eV.

The electronvolt is often used in atomic, nuclear and particle physics. For example, the energy of photons can be measured by the voltage necessary to overcome their photoelectric effect.

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Joule is used in the International System of Units for energy, but the electronvolt is often used for a tiny amount of energy, or quantum, such as that carried...

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bond between the atoms), Ed, of A-B, A-A and B-B bonds are given in electronvolts, and the factor (eV)-½ is added to make sure the final answer has no...

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record by accelerating protons to 1.18 TeV (teraelectronvolt, or trillion electronvolt). On March 30 2010, the LHC created a collision at 3.5 TeV. "LHC Machine...

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two particles, each of a certain mass—measured in terms of energy as electronvolts—are collided, they can combine into a particle of that combined mass/energy...

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