Physics

Problem

A metal sphere behaves like an ideal blackbody. Its surface area is

0.50\,\text{m}^{2}

and its temperature is

800\,\text{K}

. Take

\sigma = 5.67 \times 10^{-8}\,\text{W}\,\text{m}^{-2}\,\text{K}^{-4}

. Calculate the total power radiated by the sphere. a)

5.8 \times 10^{3}\,\text{W}

4.6 \times 10^{4}\,\text{W}

1.2 \times 10^{4}\,\text{W}

2.3 \times 10^{4}\,\text{W}