Question

Solar radiation emitted by sun resembles that emitted by a black body at a temperature of 6000 K. Maximum intensity is emitted at wavelength of about 4800 Å. If the sun were to cool down from 6000 K to 3000 K, then the peak intensity would occur at a wavelength -

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

Answer 1

Answer: (B)

9600

Answer 2

$\frac{\lambda_{m_{2}}}{\lambda_{m_{1}}}$ = $\frac{T_{1}}{T_{2}}$ Ž $\lambda_{m_{2}}$ = 9600 Å