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irradiance of a surface element by a ponctual source


Caution
Fill in all input cells.
Choose all parameters unit.
It is assumed that the dimensions of the surface are small regarding d.
All parameters are positive.

InputValueunit
I
dS
d
i
OutputValueUnit
Fto be calculated
Eto be calculated
irradiance of a surface element by a ponctual source
I : intensity of the pontual source dS : area of the surface element d : distance from the source to the surface element i : angle between the perpendicular to the surface and the direction from the ponctual source to the center of the surface element F : luminous flux illuminating the surface element E : irradiance on the surface element

Note
This calculation page can not detect all unrealistic inputs.



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