Solar radiation emitted by the sun resembles the radiations emitted by a black body at the temprature of 6000 K. Maximum intensity is emitted at a wavelength of 4800 Å. If the temperature of the sun decreases from 6000 K to 4000 K , then the peak intensity would occur at a wavelength of

Options

A. 3200Å
B. 5200Å
C. 7200Å
D. 9600Å

Answer

C

Explanation

`T_(2)/T_(1)=lamda_(1)/lamda_(2)`
`therefore4000/6000=4800/lamda_(2)" "thereforelamda_(2)=7200Å`