Physics

Problem

A perfectly black surface is maintained at

500\,\text{K}

. Take

\sigma = 5.67\times10^{-8}\,\text{W m}^{-2}\,\text{K}^{-4}

. Calculate the power radiated per unit area of the surface. a)

4.0\times10^{3}\,\text{W m}^{-2}

1.4\times10^{4}\,\text{W m}^{-2}

3.5\times10^{3}\,\text{W m}^{-2}

2.8\times10^{3}\,\text{W m}^{-2}