Definition of Stefan–Boltzmann law in US English:

Stefan–Boltzmann law


  • A law stating that the total radiation emitted by a black body is proportional to the fourth power of its absolute temperature.

    • ‘The Stefan-Boltzmann Law gives the total energy being emitted at all wavelengths by the blackbody (which is the area under the Planck Law curve).’
    • ‘The Stefan-Boltzmann law tells you how much energy a blackbody radiator of a given temperature radiates per unit area of it surface.’


Late 19th century: named after Josef Stefan (1835–93), Austrian physicist, and L. Boltzmann (see Boltzmann, Ludwig).


Stefan–Boltzmann law

/ˌstefənˈbōltsmən ˌlô/