An opaque horizontal plate is well insulated on the edges and the lower surface. The irrad...

An opaque horizontal plate is well insulated on the edges and the lower surface. The irradiation on the plate is 3000 W/m2, of which 500 W/m2 is reflected. The plate has a uniform temperature of 700 K and has an emissive power of 5000 W/m2. Determine the total emissivity and absorptivity of the plate.