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absorptance |
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absorptance [əbˈsɔːptəns -ˈzɔːp-], absorption factor n
(Physics / General Physics) Physics a measure of the ability of an object to absorb radiation, equal to the ratio of the absorbed radiant flux to the incident flux. For a layer of material the ratio of the flux absorbed between the entry and exit surfaces of the layer to the flux leaving the entry surface is the internal absorptance Symbol α Compare reflectance, transmittance [absorption + -ance] ThesaurusLegend: Synonyms Related Words Antonyms
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| ? Mentioned in | ? References in periodicals archive | |
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Four correction factors were used: the LOCR window transmittance
(TW), the LOCR receiver absorptance (AR), the relative aperture
transmittance (TA), and the LOCR electrical calibration (kL). Both can be used
for the electrical substitution equivalence measurement and their
separate positions allow checking the effectiveness of the heating
system for equivalence of optical and electrical power absorptance by
the cavity. To extend the uncertainty analysis to the NIR, one
has to check the absorptance by the chromium oxide coated receiver
cavity in the NIR. |
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