Systematic study is made of emission and absorption of thermal radiation by cavities and of transport of thermal radiation through passages; conditions under which cavity absorption characteristics can be inferred from cavity emission characteristics (and vice versa) are derived; in particular, it is shown that this reciprocity is valid when radiation entering cavity is diffusely distributed across cavity opening; available information on cavity-emission and absorption characteristics is brought together, compared, and generalized; transport of thermal radiation through passages which connect isothermal environments is analyzed for specularly and duffusely reflecting passage walls.
Radiant emission, absorption, and transmission characteristics of cavities and passages
NASA SP
NASA Special Publication ; Publ 55 ; p 103-115
1965
13 pages
Report
English
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Emission and absorption of radiant energy in model planetary atmosphere
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