Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Question
The reflectivity of aluminum coated with lead sulfate
is 0.35 for radiation at wavelengths less than 3 mm and
0.95 for radiation greater than 3 mm. Determine the average
reflectivity of this surface for solar radiation (T < 5800 K)
and radiation coming from surfaces at room temperature
(T < 300 K). Also, determine the emissivity and absorptivity
of this surface at both temperatures. Do you think this material
is suitable for use in solar collectors?
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