Difference between revisions of "Luminous Exitance"
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Revision as of 10:00, 25 February 2009
2-1-075
Luminous Exitance (at a point of a surface)
The quotient of the luminous flux (dF), leaving an element of the surface containing the point, by the area (dA) of that element.
Symbol: M
Unit: lumen per square metre (lm/m2)
Note: Formerly Luminous Emittance and, in French, Emittance Lumineuse.
Reference: C.I.E. (modified)
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)