Question

If λm for solar radiation is 4573 Ǻ and Wein’s constant b = 2.89 ⨯ 10-3 m – K. calculate the temperature of photo-sphere

Answer 1

Weins displacement law

$\lambda_mT=b$

$T=\frac{b}{\lambda_m}$

$$T=\frac{2.89\times10^{-3}}{4573\times10^{-10}}=0.064\times10^5=6400K$$