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Document Type

Research

Abstract

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.

Publication Date

1926

Journal Title

Proceedings of the Iowa Academy of Science

Volume

33

Issue

1

First Page

256

Last Page

256

Copyright

© Copyright 1926 by the Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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