IEVref:845-09-74ID:
Language:enStatus: Obsolete
Term: self-exchange coefficient (of a surface when its radiance or luminance is the same at all points and for all directions)
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Symbol: gs
Definition: quotient of that part of the radiant or luminous flux from the surface which falls on the surface itself, by the radiant or luminous exitance of the surface

unit: m2

NOTE – The self-exchange coefficient of a surface S limited by a flat curve C and situated on only one side of the plane of this curve is equal to the surface area of S minus the flat surface area limited by C.


Publication date:1987
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