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