1.

Solar radiation emitted by sun resemble that emitted by black body at 6000 K. Maximum intensity is emitted at wavelength 4800Å. If the sun were to be cooled down from 6000 K to 3000 K, then peak intensity would occur at a wavelength of :

Answer»

`4800Å`
`9600Å`
`2400Å`
`19200Å`

Solution :`lamda_(1)T_(1)=lamda_(2)T_(2)`
`lamda_(2)=(lamda_(1)T_(1))/(T_(2))=(4800xx600)/(3000)`
`lamda_(2)=9600Å`.
THUS CORRECT choice is (B).


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