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Maximum wavelength of radiation from bla...

Maximum wavelength of radiation from black body at 1640 K temp. is 1.75 `mum`. If moon is considered as perfect black body and maximum wavelength radiation from it is 14.35 `mum`, then what should be the temperature of moon ?

A

100K

B

150 K

C

200 K

D

250 K

Text Solution

Verified by Experts

The correct Answer is:
C
From Wein.s displacement law,
`lamda_(m_(1))T_(1)=lamda_(m_(2))T_(2)`
`:.T_(2)=T_(1)xx(lamda_(m_(1)))/(lamda_(m_(2))`
`=1640xx(1.75)/(14.35)=200K`
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