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exposure units

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  • 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

  • Conversion of units — is the conversion between different units of measurement for the same quantity, typically through multiplicative conversion factors. Contents 1 Techniques 1.1 Process 1.2 Multiplication factors …   Wikipedia

  • Mere exposure effect — The mere exposure effect is a psychological phenomenon by which people tend to develop a preference for things merely because they are familiar with them. In social psychology, this effect is sometimes called the familiarity principle. The effect …   Wikipedia

  • Permissible exposure limit — The permissible exposure limit (PEL or OSHA PEL) is a legal limit in the United States for exposure of an employee to a chemical substance or physical agent. For chemicals, the chemical regulation is usually expressed in parts per million (ppm),… …   Wikipedia

  • List of unusual units of measurement — For units of measure primarily used in countries where English is not the main language, see the article specific to that country, a list of which can be found in the systems of measurement article. An unusual unit of measurement is a unit of… …   Wikipedia

  • Ionizing radiation units — Radiation Measurement Units International System (SI) Activity of an isotope or material conventional unit: 1 curie = 37 billion disintegrations per second. SI unit: 1 becquerel = 1 disintegration per secondconversions1 curie (Ci) = 37… …   Wikipedia

  • List of scientific units named after people — This is a list of scientific units named after people. For other lists of eponyms (names derived from people) see eponym.Note that by convention, the name of the unit is properly written in all lowercase, but its abbreviation is capitalized.SI… …   Wikipedia

  • Roentgen (unit) — This article is about the unit of measurement. For Röntgen radiation, see X ray. For other uses, see Roentgen. The roentgen (R, also röntgen) is a unit of measurement for exposure to ionizing radiation (such as X ray and gamma rays), and is named …   Wikipedia

  • Olympus OM system — The Olympus OM System was a line of 35mm single lens reflex cameras, lenses and accessories sold by Olympus between 1972 and 2002 (some accessories were sold through early 2003). The system was introduced by Olympus in 1972, more than a decade… …   Wikipedia

  • Insurance — This article is about risk management. For Insurance (blackjack), see Blackjack. For Insurance run (baseball), see Insurance run. In law and economics, insurance is a form of risk management primarily used to hedge against the risk of a… …   Wikipedia

  • photography, technology of — Introduction       equipment, techniques, and processes used in the production of photographs.  The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …   Universalium

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