Question: An opaque surface with the prescribed spectral, hemispherical reflectivity distribution is subjected to the spectral irradiation shown. (a) Sketch the spectral hemispherical absorptivity distribution. (b)

An opaque surface with the prescribed spectral, hemispherical reflectivity distribution is subjected to the spectral irradiation shown.

(a) Sketch the spectral hemispherical absorptivity distribution.

(b) Determine the total irradiation on the surface.

(c) Determine the radiant flux that is absorbed by the surface.

(d) What is the total, hemispherical absorptivity of this surface?

600 1.0 300 0.5 5 10 15 10 15 A (um) 20

600 1.0 300 0.5 5 10 15 10 15 A (um) 20 (wit, WIM)'o

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