Consider an opaque horizontal plate that is well insulated on the edges and the lower surf...

Consider an opaque horizontal plate that is well insulated on the edges and the lower surface. The plate is maintained at 500 K, has a total hemispherical absorptivity of 0.5 1 and the following spectral emissivity function:

If the plate is subjected to an irradiation of 5600W/m2, determine (a) the total hemispherical emissivity and (b) the radiosity of the plate surface.