What does photometer mean?

Definitions for photometer
foʊˈtɒm ɪ tərpho·tome·ter

This dictionary definitions page includes all the possible meanings, example usage and translations of the word photometer.

Princeton's WordNet

  1. photometernoun

    measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source

  2. light meter, exposure meter, photometernoun

    photographic equipment that measures the intensity of light


  1. photometernoun

    Any of several instruments used to measure various aspects of the intensity of light.

  2. photometerverb

    To measure some aspect of light (from a star) using a photometer.


  1. Photometer

    A photometer is an instrument that measures the strength of electromagnetic radiation in the range from ultraviolet to infrared and including the visible spectrum. Most photometers convert light into an electric current using a photoresistor, photodiode, or photomultiplier.


  1. photometer

    A photometer is a scientific instrument used to measure the intensity of light or its properties such as brightness and absorption. It works by comparing the light from two sources, one of which is known while the other is unknown. This instrument is utilized in various fields such as physics, photography, astronomy, and environmental science.

Webster Dictionary

  1. Photometernoun

    an instrument for measuring the intensity of light, or, more especially, for comparing the relative intensities of different lights, or their relative illuminating power

  2. Etymology: [Photo- + -meter: cf. F. photomtre.]


  1. Photometer

    In its widest sense, a photometer is an instrument for measuring light intensity or optical properties of solutions or surfaces. Photometers are used to measure: ⁕Illuminance ⁕Irradiance ⁕Light absorption ⁕Scattering of light ⁕Reflection of light ⁕Fluorescence ⁕Phosphorescence ⁕Luminescence

Chambers 20th Century Dictionary

  1. Photometer

    fō-tom′e-tėr, n. an instrument for measuring the intensity of light, esp. for comparing the amount of light coming from different sources.—adjs. Photomet′ric, -al.—n. Photom′etry, the measurement of the intensity of light. [Gr. phōs, phōtos, light, mētron, a measure.]

The Standard Electrical Dictionary

  1. Photometer

    An apparatus for measuring the intensity of light emitted by a given lamp or other source of illuminating power. They may be classified into several types. Calorimetric or Heat Photometers act by measuring relatively the heat produced by the ether waves (so-called radiant heat) emitted by the source. The accuracy of the instrument is increased by passing the rays through an alum solution. A thermopile, or an air thermometer, may be used to receive the rays. Chemical Photometers. In these the light falls upon sensitized photographic paper. The depth of coloration is used as the index of illuminating power. Direct Visual Photometers. These include Rumford's Shadow Photometer, Bunsen's Bar Photometer, and Wheatstone's Bead Photometer, in which the light is estimated by direct visual comparison of its effects. Optical Photometers. These include Polarization Photometers, in which the light is polarized; Dispersion Photometers, in which a diverging lens is placed in the path of the rays of light so as to reduce the illuminating power in more rapid ratio than that of the square of the distance. Selenium Photometers, in which the variations in resistance of selenium as light of varying intensity falls upon it is used as the indicator of the intensity of the light. Jet Photometers, for gas only, in which the height of a flame under given conditions, or the conditions requisite to maintain a flame of given height, is used to indicate the illuminating power. The subject of photometers has acquired more importance than ever in view of the extensive introduction of the electric light. (See Candle, Standard--Carcel--Violé's Standard--and Photometers of various kinds.)

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How to say photometer in sign language?


  1. Chaldean Numerology

    The numerical value of photometer in Chaldean Numerology is: 6

  2. Pythagorean Numerology

    The numerical value of photometer in Pythagorean Numerology is: 9

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Translations for photometer

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"photometer." Definitions.net. STANDS4 LLC, 2024. Web. 26 May 2024. <https://www.definitions.net/definition/photometer>.

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