Find the mean illuminance of the irradiated part of an opaque sphere receiving (a) A parallel luminous

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Find the mean illuminance of the irradiated part of an opaque sphere receiving
(a) A parallel luminous flux resulting in illuminance Eo at the point of normal incidence;
(b) Light from a point isotropic source located at a distance l =100 cm from the centre of the sphere; the radius of the sphere is R = 60 cm and the luminous intensity is I = 36 cd.
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University Physics with Modern Physics

ISBN: 978-0321501219

12th Edition

Authors: Hugh D. Young, Roger A. Freedman, Lewis Ford

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