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View synonyms for photometer

photometer

[ foh-tom-i-ter ]

noun

, Optics.
  1. 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.


photometer

/ fəʊˈtɒmɪtə /

noun

  1. 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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Word History and Origins

Origin of photometer1

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

Euclid also has a near-infrared spectrometer and photometer for measuring each galaxy’s redshift, or the wavelength-stretching effect that occurs in light arriving from the faraway cosmos.

The University of Bern has provided a powerful photometer for the telescope.

From BBC

He just needed a photometer 1000 times more sensitive than any available.

Earth appears so bright because Kepler's light-sensing photometer is exquisitely sensitive.

For each sample, I use a refractometer, which measures moisture content, a pH meter for acidity, a honey color photometer, and other instruments that measure acidity and viscosity.

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photomechanical transferphotometric brightness