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Wien�s law :
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�������� peak = 0.289 / T(K) cm
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�peak color:
hotter bluer (shorter )
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���������������������� cooler redder (longer )
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Greater total energy (summed over all
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wavelengths)
radiated by hotter objects
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Stefan�s Law :
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energy
radiated/unit area of B-B
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surface/unit
time (temp)4
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���������������������� F = T4
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� Flux�
= 5.67x 10-8T4 watt/m2/K4
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Stefan�s constant =
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