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Maximum wavelength of radiations from Su...

Maximum wavelength of radiations from Sun and Moon are `25Å` and `0.5xx10^(-6)`m respectively ratio of their temperature is . . . .. .

A

`1:1000`

B

`1:2000`

C

`200:1`

D

`400:1`

Text Solution

Verified by Experts

The correct Answer is:
C
From Wein.s displacement law,
`lamda_(m)T=` constant
`:.(lamda_(m))_(s)T_(s)=(lamda_(m))_(m)T_(m)`
`:.(T_(s))/(T_(m))=((lamda_(m))_(m))/((lamda_(m))_(s))=(0.5xx10^(-6))/(25xx10^(-10))`
`=0.02xx10^(4)` `=200:1`
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