A perfectly black surface is maintained at

PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

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}

(b)

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

(c)

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

(d)

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