Problem 2. 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. E Gref G \T, = 700 K

Fig: 1