A surface with emissivity emits thermal radiation at the rate of

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

Problem

A surface with emissivity

0.60

emits thermal radiation at the rate of

1.2\,\text{kW m}^{-2}

. Using

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

, determine its absolute temperature. (a)

636\,\text{K}

(b)

430\,\text{K}

(c)

381\,\text{K}

(d)

771\,\text{K}