Stefan's law

/ (ˈstɛfənz) /

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 –4 Also called: Stefan-Boltzmann law

Word Origin for Stefan's law

C19: named after Josef Stefan (1835–93), Austrian physicist