Astronomy   View all facts   Glossary   Help
abstraction > mathematical concept > number > constant > fundamental physical constant > physico chemical constant > Stefan-Boltzmann constant
Next physico chemical constant: Wien displacement law constant    Up: physico chemical constant    Previous physico chemical constant: second radiation constant   

Stefan-Boltzmann constant
(σ)
subjectfact 
Stefan-Boltzmann constanthas symbol σhas source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:33:12.0
has value 5.670400 × 10-8 W m-2 K-4has URL: http://physics.nist.gov/cgi-bin/cuu/Value?eqsigma, 2001-09-27 09:33:12.0
has equation 2001-09-27 09:33:11.0
has uncertainty 0.000040 × 10-8 W m-2 K-42001-09-27 09:33:12.0
has definition The constant of proportionality relating the luminosity of a star to its absolute temperature: σ = 5.67 × 10-5 ergs cm-2 (deg-K)-4 s-1.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:12.0
has definition A constant relating the energy radiated by a black body to its absolute temperature and incorporated in the Stefan-Boltzmann radiation law which states that the energy radiated per unit time is given by σ(T4 - T40), where σ is the Stefan-Boltzmann constant and T and T0 are the absolute temperatures of the body and its surroundings expressed in kelvins.has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:33:12.0
is an instance of physico chemical constant2001-09-27 09:33:12.0
fundamental physical constanthas accuracy2001-09-27 09:32:59.0
has unit2001-09-27 09:32:59.0