Electron volt: Difference between revisions
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<onlyinclude>An '''electron volt''' (also written '''electron-volt''' and '''eV''') is a unit of [[energy]], specifically the energy that it takes to move an [[electron]] through the [[voltage|potential difference]] of 1 [[volt]] (or a [[proton]] moving through the same potential difference, in a different direction).</onlyinclude><ref>Jean Tate. (February 17, 2010). ''The Electronvolt'' [Online]. Available: http://www.universetoday.com/56463/electron-volt/ [February 20, 2015]. </ref> This small unit of energy is useful when discussing the energy released from [[chemical reaction]]s or moving electrons closer or further from the [[nucleus]] in an [[atom]]. | <onlyinclude>An '''electron volt''' (also written '''electron-volt''' and '''eV''') is a [[units|unit]] of [[energy]], specifically the energy that it takes to move an [[electron]] through the [[voltage|potential difference]] of 1 [[volt]] (or a [[proton]] moving through the same potential difference, in a different direction).</onlyinclude><ref>Jean Tate. (February 17, 2010). ''The Electronvolt'' [Online]. Available: http://www.universetoday.com/56463/electron-volt/ [February 20, 2015]. </ref> This small unit of energy is useful when discussing the energy released from [[chemical reaction]]s or moving electrons closer or further from the [[nucleus]] in an [[atom]]. | ||
When converting from [[mass]] to energy the MeV ([[prefixes|mega]] electron volt) is useful. This leads to a derived unit of mass the MeV/c<sup>2</sup>, which is useful for looking at [[nuclear fission|nuclear reaction]]s. | When converting from [[mass]] to energy the MeV ([[prefixes|mega]] electron volt) is useful. This leads to a derived unit of mass the MeV/c<sup>2</sup>, which is useful for looking at [[nuclear fission|nuclear reaction]]s. | ||
Revision as of 19:47, 28 August 2015
An electron volt (also written electron-volt and eV) is a unit of energy, specifically the energy that it takes to move an electron through the potential difference of 1 volt (or a proton moving through the same potential difference, in a different direction).[1] This small unit of energy is useful when discussing the energy released from chemical reactions or moving electrons closer or further from the nucleus in an atom.
When converting from mass to energy the MeV (mega electron volt) is useful. This leads to a derived unit of mass the MeV/c2, which is useful for looking at nuclear reactions.
Converter
Read more about the electron volt in Dr. Rowlett's unit dictionary.
References
- ↑ Jean Tate. (February 17, 2010). The Electronvolt [Online]. Available: http://www.universetoday.com/56463/electron-volt/ [February 20, 2015].