2. A point source emits 800 lumens in a spherically uniform way. A hemispherical reflector is placed about the source as

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2 A Point Source Emits 800 Lumens In A Spherically Uniform Way A Hemispherical Reflector Is Placed About The Source As 1 (120.9 KiB) Viewed 49 times

2. A point source emits 800 lumens in a spherically uniform way. A hemispherical reflector is placed about the source as shown. The interior of the reflector exhibits a perfectly specular reflectance of 0.95. The reflector is 2.5' in radius and is placed such that the source is at the center of the opening of the hemisphere. Find the following. a. The illuminance at any point on the interior of the reflector. b. The total number of lumens leaving the reflector. C. The illuminance at point p. Point p is directly below the source, with its normal pointed up. A disc, A, is placed at point p. It exhibits a perfectly specular reflectance of 0.50. Find the following. d. The number of lumens incident onto the plate. e. The number of lumens leaving the plate. f. The illuminance at point q. Point is on the rim of the hemispherical reflector, with its normal pointed down. hemispherical reflector source •-2.5 point a disc A radius=2 point p