Physics

Problem

a. (i) A metal surface at

1500\,\text{K}

is found to radiate

2.20\times10^{5}\,\text{W\,m}^{-2}

. Calculate the rate at which it would radiate if it behaved as an ideal blackbody. b. (ii) Hence determine the emissivity

\varepsilon

of the surface at this temperature.