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Published in:
1971 | OriginalPaper | Chapter
Non-Point Sources
Author : H. A. E. Keitz
Published in: Light Calculations and Measurements
Publisher: Macmillan Education UK
Included in: Professional Book Archive
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The formulae developed in the preceding chapters all refer to light sources which can be regarded as a point constituting the apex of a solid angle). The derivations have each time been based on the cone-shaped propagation of the luminous radiation, i.e. on the inverse square law.