20
Key Points
¥
Radiation is emitted from all objects that have
temperatures warmer than absolute zero (0 K).
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WienÕs Law: wavelength of maximum emission
–
l
MAX
= (0.29
«
10
4
m
m K)
«
T
-1
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Stefan-Boltzmann Law: total energy emission
–
E= (
5.67
«
10
-8
W/m
2
)
«
T
4