Comparison of indirect and direct illumination (1912)
Habrylwicz, Valentine Bernard, Kailer, Frank Spencer · leaf 62
ctor, taking into account the angle at which the rays strike. Referring tothe diagram below, a beam of light coming in the direction OD falls upon a plane AB, illuminating it with an intensity of one foot-candle. Then theillumination on the plane AC,which intercepts the same amount of light asAB,… … _ K I (1)
Interior lighting · Lighting · School Buildings · Theses
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
