Boltzmann constant: Difference between revisions
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The '''Boltzmann constant''' (<math>k</math> or <math>k_B</math>) is the physical constant relating [[temperature]] to [[energy]]. | The '''Boltzmann constant''' (<math>k</math> or <math>k_B</math>) is the physical constant relating [[temperature]] to [[energy]]. | ||
It is named after the Austrian physicist [[Ludwig Eduard Boltzmann]]. | It is named after the Austrian physicist [[Ludwig Eduard Boltzmann]]. | ||
Its experimentally determined value (in SI units, 2002 [http://physics.nist.gov/cgi-bin/cuu/Value?k#mid CODATA] value) is: | Its experimentally determined value (in SI units, 2002 [http://physics.nist.gov/cgi-bin/cuu/Value?k#mid CODATA] value) is: | ||
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::<math> =8.617 343(15) \times 10^{-5}</math> <math>\left.eV\right.</math> <math>\left.K^{-1}\right.</math> | ::<math> =8.617 343(15) \times 10^{-5}</math> <math>\left.eV\right.</math> <math>\left.K^{-1}\right.</math> | ||
In units with molecular significance it is close to 1, | In units with molecular significance it is close to 1, for example see: [[DL_POLY | DL_POLY units]]. | ||
==See also== | ==See also== | ||
*[http://dx.doi.org/10.1103/PhysRevLett.98.250801 C. Daussy, M. Guinet, A. Amy-Klein, K. Djerroud, Y. Hermier, S. Briaudeau, Ch. J. Bordé, and C. Chardonnet "Direct Determination of the Boltzmann Constant by an Optical Method", Physical Review Letters '''98''' 250801 (2007)] | *[http://dx.doi.org/10.1103/PhysRevLett.98.250801 C. Daussy, M. Guinet, A. Amy-Klein, K. Djerroud, Y. Hermier, S. Briaudeau, Ch. J. Bordé, and C. Chardonnet "Direct Determination of the Boltzmann Constant by an Optical Method", Physical Review Letters '''98''' 250801 (2007)] | ||
[[Category: Physical constants]] | [[Category: Physical constants]] | ||
Revision as of 12:44, 25 October 2007
The Boltzmann constant ( or ) is the physical constant relating temperature to energy. It is named after the Austrian physicist Ludwig Eduard Boltzmann. Its experimentally determined value (in SI units, 2002 CODATA value) is:
In units with molecular significance it is close to 1, for example see: DL_POLY units.