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absorptance, α Ratio of the absorbed to the incident radiant power. Also called absorption factor. When α ≤ 1, α ≈ Ae, where Ae is the Napierian absorbance. [3] See also absorbance
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absorptanceThe ratio of absorbed incident energy to the total energy to which a body is exposed.
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absorptanceThe ratio of the radiation absorbed by a surface to the total energy falling on that surface described as a percentage.
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absorptanceOne minus the sum of reflectance and transmittance. Compare absorbance.
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absorptanceThe ratio of the luminous flux or absorbed radiant flux to the incident flux.
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absorptanceThe ratio of the total absorbed radiation to the total incident radiation.
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absorptance(n) a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or [..]
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absorptance
(optics,physics) Absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation. First attested in the mid 20th century.
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absorptanceThe ratio of radiation energy absorbed by a surface to that of the radiation falling on the surface.
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