15
Stefan-BoltzmannŐs (SB) Law
ĄThe hotter the object, the more radiation emitted.
ĄWhen the temperature is doubled, the emitted energy increases by a factor of 16!
ĄStefan-BoltzmannŐs Law
ĄE= (5.67«10-8 Wm-2K-4 )«T4
–E=2«2«2«2=16
–   4 times
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Sun Temp: 6000K
Earth Temp: 300K
Aguado, Fig. 2-7