A surface absorbs 10 percent of radiation at wavelengths less than 3 mm and 50 percent of
Question:
A surface absorbs 10 percent of radiation at wavelengths less than 3 mm and 50 percent of radiation at wavelengths greater than 3 μm. The average absorptivity of this surface for radiation emitted by a source at 3000 K is
(a) 0.14
(b) 0.22
(c) 0.30
(d) 0.38
(e) 0.42
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Related Book For
Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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