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A black body at 200 K is found to exit m...

A black body at 200 K is found to exit maximum energy at a wavelength of `14mu m` . When its temperature is raised to 1000 K , the wavelength at which maximum energy is emitted is

A

`14mum`

B

`70muF`

C

`2.8mum`

D

`7mum`

Text Solution

Verified by Experts

The correct Answer is:
C
`lamda_(m_(1))T_(1)=lamda_(m_(2))T_(2)`
`therefore lamda_(m_(2))=(lamda_(m_(1))T_(1))/(T_(2))=(14xx200)/(1000)`
`=2.8mum`.
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