For maximum radiant energy from the moon, the corresponding wavelength is 14 micron. If Wien's constant is b = 2892 X 10-6 mK, then temperature of the moon is
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a
207 K
b
270 K
c
2070C
d
270 0C
answer is A.
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Detailed Solution
Given, λm=14 micron =14μm=14×10−6mand Wien constant, b=2892×10−6mKAccording to Wien's displacement law,λm=bT or T=bλm=2892×10−6mK14×10−6m∴ T=206.6K≈207K
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For maximum radiant energy from the moon, the corresponding wavelength is 14 micron. If Wien's constant is b = 2892 X 10-6 mK, then temperature of the moon is