Chapter 40, Problem 75CP

(a)

To determine

The prove Stefan’s law which states that ${\displaystyle \underset{0}{\overset{\infty }{\int }}I\left(\lambda ,T\right)d\lambda }=\sigma T^4$ .

(b)

To determine

To show that $\sigma$ has the value $5.67\times {10}^{-8}{\text{ W/m}}^2\cdot {\text{K}}^4$ .