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Alternative term: Absorption Factor

The ratio of the absorbed luminous flux (Fa) to the incident flux (Fo).

Symbol: a

Reference: CContrastCelsius (previously Centigrade)Capacitance.Icharge currentIntensity.EIlluminanceEnergy. (modified)

Please note that this is the term as it stands in the original IALAInternational Association of Marine Aids to Navigation and Lighthouse Authorities - AISM Dictionary edition (1970-1989)