photometer

[ foh-tom-i-ter ]

See synonyms for photometer on Thesaurus.com

nounOptics.

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.

Origin of photometer

From the New Latin word photometrum, dating back to 1770–80. See photo-, -meter

Words Nearby photometer

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use photometer in a sentence

Prof. Zenger's differential photometer that we shall finally cite is an improvement upon Bunsen's.
Scientific American Supplement, No. 421, January 26, 1884 | Various
The photometer, preferably one of the Lummer-Brodhun form, is set up on a gallery or bench.
Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 6 | Various
There is no other way of measuring the exposure than by the photometer or personal experience, and the latter is by far the best.
Scientific American Supplement, No. 362, December 9, 1882 | Various
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

photometer

/ (fəʊˈtɒmɪtə) /

noun

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

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