Physics - Heat & Thermo Question with Solution | TestHub

The black grid at the back of a refrigerator has an area of 0.5 $m^2$ and emissivity 0.9. It is at 330 K in a room at 300 K. Find the net power it radiates in watts ($\sigma =5.67\times 10^{-8}$ W $m^{-2}$$K^{-4}$; nearest whole number).