The variations of the spectral emissivity of two surfaces are as given in Fig. P12–55. Det...

The variations of the spectral emissivity of two surfaces are as given in Fig. P12–55. Determine the average emissivity of each surface at T= 3000 K. Also, determine the average absorptivity and reflectivity of each surface for radiation coming from a source at 3000 K. Which surface is more suitable to serve as a solar absorber?