Solar radiation emitted by sun resembles that emitted by a body at a temperature of `6000 K` Maximum intensity is emitted at a wavelength of about `4800A^(@)` If the sun was cooled down from `6000K` to `3000K` then the peak intensity would occure at a wavelenght of .

Options

A. 4800 Å
B. 9600 Å
C. 2400 Å
D. 19200 Å

Answer

B

Explanation

According to Wein.s displacement law, `lambda_(m)T=b`.
where `b=2.884xx10^(-3)` mK.
So `lambda_(m_(1)) T_(1)=lambda_(m_(2))T_(2)`
or `4800 xx 6000 =lambda_(m_(2)) xx 3000 or lambda_(m_(2))=9600`Å