A rectangular enclosure has sides 1 m 2 m 4 m. The 1 2 m faces are black and at temperatures of 200°C and 100°C respectively. Calculate the net radiative energy exchange between the two surfaces,...

A rectangular enclosure has sides 1 m

2 m

4 m. The 1

2 m faces are black and at temperatures of 200°C and 100°C respectively. Calculate the net radiative energy exchange between the two surfaces, if the other four faces of the enclosure are reradiating surfaces.