Electronvolts | Wikipedia audio article
Channel: wikipedia tts
Date: 19/01/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Electronvolt


00:01:25 1 Definition
00:02:22 2 Mass
00:05:16 3 Momentum
00:05:37 4 Distance
00:08:49 5 Temperature
00:09:12 6 Properties
00:11:10 7 Scattering experiments
00:12:01 8 Energy comparisons
00:12:12 8.1 Per mole
00:14:27 9 See also
00:17:21 10 Notes and references
00:18:13 11 External links
00:21:49 Per mole
00:22:21 See also
00:22:33 Notes and references
00:22:43 External links



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SUMMARY
=======
In physics, the electronvolt (symbol eV, also written electron-volt and electron volt) is a unit of energy equal to approximately 1.6×10−19 joules (symbol J) in SI units. 
Historically, the electronvolt was devised as a standard unit of measure through its usefulness in electrostatic particle accelerator sciences, because a particle with 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 terminal bias in volts, one gets an energy in eV.
Like the elementary charge on which it is based, it is not an independent quantity but is equal to 1 J/C √2hα / μ0c0. 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.