e亿 The rate of radiation 1700K (总辐出度) 1500K The energy emitted by unit area of surface per unit 1300K time 1100K E(T)=()da 0123 4 (同 Stefan-Boltzmann equation E(T)=OT4 Stefan constant:o =5.6703x10 (W.m 2.K4)0 1 2 3 4 The rate of radiation （总辐出度） The energy emitted by unit area of surface per unit time. Stefan-Boltzmann equation 4 Eo (T)  o T Stefan constant: