A small flat plate is positioned just beyond the earths
Chapter , Problem 12.21(choose chapter or problem)
A small flat plate is positioned just beyond the earths atmosphere and is oriented such that the normal to the plate passes through the center of the sun. Refer to 12.20 for pertinent earthsun dimensions. (a) What is the solid angle subtended by the sun about a point on the surface of the plate? (b) Determine the incident intensity, Ii , on the plate using the known value of the solar irradiation above the earths atmosphere (GS 1368 W/m2 ). (c) Sketch the incident intensity Ii as a function of the zenith angle , where is measured from the normal to the plate.
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