Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An instrument for measuring a property of light, especially luminous intensity or flux.
from The Century Dictionary.
- noun In photography, a device for determining the proper length of time for exposure. See
actinometer . - noun An instrument for determining the length of time proper for photographic exposures.
- noun An instrument used to measure the intensity of light, specifically to compare the relative ! intensities of the light emitted from different sources.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Physics) An instrument for measuring the intensity of light, or, more especially, for comparing the relative intensities of different lights, or their relative illuminating power.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics Any of several
instruments used tomeasure various aspects of theintensity oflight . - verb astronomy To measure some aspect of
light (from a star) using a photometer.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun photographic equipment that measures the intensity of light
- noun measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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To accomplish this mission, a space-based photometer is being developed that employs a 0. 95m aperture Schmidt telescope coupled to a very large focal plane array (FPA) measuring 14” (L) x 14” (W) x 10” (D).
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If the photometer were analog, you could remove the cover and feel the position of the needle.
Carry-Over Thread 2007
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Anyone who wants to make sure their sunglasses have adequate protection can have them tested by a machine called a photometer in an ophthalmologist's or optician's office.
Dr. Rock Positano: Sunglasses Are More Than A Fashion Statement 2008
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An instrument for measuring the strength of a light is called a photometer, and there are many different varieties, just as there are varieties of scales which measure household articles.
General Science Bertha M. Clark
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Munsell photometer, which is briefly referred to, is an instrument of wide range, high precision, and great sensitiveness, and permits the valuations which are necessary in his system to be accurately made.
A Color Notation A measured color system, based on the three qualities Hue, Value and Chroma 1888
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The mission's science instrument, called a photometer, contains the largest camera ever flown in space -- its 42 charge-coupled devices (CCDs) will detect slight dips in starlight, which occur when planets passing in front of their stars partially block the light from Kepler's view.
unknown title 2009
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The mission's science instrument, called a photometer, contains the largest camera ever flown in space - its 42 charge-coupled devices (CCDs) will detect slight dips in starlight, which occur when planets passing in front of their stars partially block the light from Kepler's view.
Universe Today 2009
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The mission's science instrument, called a photometer, contains the largest camera ever flown in space -- its 42 charge-coupled devices
SpaceRef Top Stories 2009
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It's fitted with a specially-designed telescope called a photometer or light meter designed to detect small variations in the brightness of stars.
CNN.com 2009
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It's fitted with a specially-designed telescope called a photometer or light meter designed to detect small variations in the brightness of stars.
CNN.com 2009
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