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Solid angle

Gigahertz Optik - Light Measurement Solutions In paragraph II.5., the concept of differential quantities and integral calculus is briefly explained for spectral radiometric quantities. II.4.a. Definition of solid angle The geometric quantity of a solid angle Ω quantifies a part of an observer’s visual field. If we imagine an observer located at point P, his full... See #1. 1: http://www.gigahertz-optik.com [c977612]