Definition: | source of incoherent radiation, the dimensions of which are small enough, compared to the distance between the source and the irradiated surface, to be negligible in calculations and measurements Note 1 to entry: A point source which emits uniformly in all directions is called a uniform point source or an isotropic point source. Note 2 to entry: This entry was numbered 845-01-19 in IEC 60050-845:1987.
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