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Stefan's law

/ (ˈstɛfənz) /
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noun
the principle that the energy radiated per second by unit area of a black body at thermodynamic temperature T is directly proportional to T 4 . The constant of proportionality is the Stefan constant, equal to 5.670400 × 10 –8 Wm –2 K –4Also called: Stefan-Boltzmann law
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Word Origin for Stefan's law

C19: named after Josef Stefan (1835–93), Austrian physicist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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