In space ships, heat rejection to the surroundings is by radiation. A radiator in a space ship has an absorptivity α of 0.1 for 0 < λ < 2 μm, and 0.95 for λ > 2 μm. The surface is maintained at 600 K. What is the net heat flux from the surface when solar irradiation on the surface is 1200 W/m2? Assume a sky temperature of 0 K and that the surface is diffuse.