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photometric units

См. также в других словарях:

  • Photometric system — In astronomy, a Photometric system is a set of well defined passbands (of filters), with a known sensitivity to incident radiation. The sensitivity usually depends on the optical system, detectors and filters used. For each photometric system a… …   Wikipedia

  • Photometry (optics) — This article deals with the usage of this term in optics and lighting .Photometry is the science of measurement of light, in terms of its perceived brightness to the human eye. It is distinct from radiometry, which is the science of measurement… …   Wikipedia

  • Exposure (photography) — Underexposure redirects here. For the 2005 film by Oday Rasheed, see Underexposure (2005 film). A long exposure showing stars rotating around the southern and northern celestial poles. Credit: European Southern Observatory …   Wikipedia

  • Lux — For other uses, see Lux (disambiguation). A lux meter for measuring illuminances in work places. The lux (symbol: lx) is the SI unit of illuminance and luminous emittance measuring luminous power per area. It is used in photometry as a measure of …   Wikipedia

  • Lighting — Not to be confused with lightning. For other uses, see lighting (disambiguation). Low intensity lighting and haze in a concert hall allows laser effects to be visible …   Wikipedia

  • André Blondel — Infobox Scientist name = André Blondel box width = image size =150px caption = André Blondel in 1888 birth date = August 28, 1863 birth place = Chaumont, Haute Marne death date = November 15, 1938 death place = Paris residence = citizenship =… …   Wikipedia

  • Blondel, André-Eugène — ▪ French physicist born Aug. 28, 1863, Chaumont, France died Nov. 15, 1938, Paris       French physicist known for his invention of the oscillograph and for his development of a system of photometric units (photometry) of measurement.… …   Universalium

  • Candela — This article is about the unit of luminous intensity. For other uses, see Candela (disambiguation). Photopic (black) and scotopic[1] (green) luminosity functions. The photopic includes the CIE 1931 standard[2] …   Wikipedia

  • Light — For other uses, see Light (disambiguation). Visible light redirects here. For other uses, see Visible light (disambiguation) …   Wikipedia

  • The Dark Energy Survey — DES logo The Dark Energy Survey (DES) is a survey that aims to probe the dynamics of the expansion of the universe and the growth of large scale structure. The collaboration is composed of research institutes and universities from United… …   Wikipedia

  • Radiant energy — Visible light (a form of radiant energy) scattered by fog in a forest. Radiant energy is the energy of electromagnetic waves.[1] The quantity of radiant energy may be calculated by integrating radiant flux (or power) with respect to time and …   Wikipedia

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