an instrument that measures luminous intensity or brightness, luminous flux, light distribution, color, etc., usually by comparing the light emitted by two sources, one source having certain specified standard characteristics.
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How to use photometer in a sentence
Prof. Zenger's differential photometer that we shall finally cite is an improvement upon Bunsen's.
The photometer, preferably one of the Lummer-Brodhun form, is set up on a gallery or bench.
There is no other way of measuring the exposure than by the photometer or personal experience, and the latter is by far the best.
A number of measurements of the illuminating power of an electric lamp were rapidly made during the lecture with this photometer.Scientific American Supplement, No. 288 | Various
An application of the law of intensity is made in using a simple (Bunsen) photometer.Physics | Willis Eugene Tower
British Dictionary definitions for photometer
an instrument used in photometry, usually one that compares the illumination produced by a particular light source with that produced by a standard source: See also spectrophotometer
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012