It has been generally assumed that the efficiency of a diffusing bowl is independent of the intensity of the source of light providing the color is kept constant. As preliminary experiments indicated that this conclusion was not justified, a special photometer was constructed and measurements were made by eleven independent observers on different types of diffusing bowls and lamps. The results show (1) that the efficiency of a bowl is a function of the lamp wattage, the color of the lamp remaining the same; and (2) that the shape of the efficiency-wattage curve depends upon the color of the source.
Proceedings of the Iowa Academy of Science
© Copyright 1926 by the Iowa Academy of Science, Inc.
McCracken, E. C.
"Efficiency of Diffusing Bowls as a Function of the Lamp Wattage,"
Proceedings of the Iowa Academy of Science, 33(1), 256-256.
Available at: https://scholarworks.uni.edu/pias/vol33/iss1/79