The Scientific Basis of Illuminating Engineering |
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A. H. TAYLOR angle approximately atom bolometer brightness calculated candlepower candles ceiling cent Chap color temperature component concepts cones considered constant diagram Diff disk distance effect electrons emitted equation erythemal experimental filament filter give given glare glass half-field homogeneous radiation I.E.S. Trans illuminating engineer incandescent lamps infrared integration intensity inverse-square law irradiation light sources lumens lumens/sq ft luminaire luminosity luminous efficacy luminous flux luminous panel measured mercury-vapor lamp method micron obtained perfectly diffusing photocell photometric physical Planckian radiator plane plotted Problem produced radiant energy radiant power radiation factor radiosity reflection factor reflector retina sensation shown in Fig Solid opal spectroradiometric curve spectrum square centimeter Stds Table tion total flux transmission factor tungsten tungsten lamp ultraviolet uniform luminosity unit visibility curve visible region vision visual acuity voltage volts walls watts per square watts/sq cm wave wavelength window