Luminous Exitance: Difference between revisions
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Luminous Exitance (at a point of a surface) | Luminous Exitance (at a point of a surface) | ||
Latest revision as of 09:15, 17 September 2026
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)
