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Photo manipulation dates back to some of the earliest photographs captured on glass and tin plates during the 19th century. The practice began not long after the creation of the first photograph (1825) by Joseph Nicéphore Niépce who developed heliography and made the first photographic print from a photoengraved printing plate.
A camera-shy person hides her face. Camera shyness is the desire to avoid being photographed or filmed. It is common for individuals who are camera-shy to fear public speaking, performing in front of an audience, and having one's picture taken by any type of camera or by video camera.
Photo identification cards appear to have been first used at the 1876 Centennial Exposition in Philadelphia, Pennsylvania.The Scottish-born Canadian photographer William Notman, through his affiliated business, Centennial Photographic Co., which had exclusive photographic concession at the exhibition, introduced a photo identification system that was required for all exhibitors and employees ...
Kodachrome K135 20 Color Reversal film Kodachrome II – film for color slides; the 35 millimeter still photography format is shown above. Kodachrome was the first color film to be successfully mass-marketed that used a subtractive color method.
The sources for this broad definition are the U.S. Centers for Disease Control (CDC), Scientific American, and the Handbook of Toxicology of Chemical Warfare Agents. Thus the fact checkers reported that the difference between pepper spray and traditional tear gas compounds is only semantics , because the practical effect is the same: chemically ...
Photoexcitation is the first step in a photochemical process where the reactant is elevated to a state of higher energy, an excited state.The first law of photochemistry, known as the Grotthuss–Draper law (for chemists Theodor Grotthuss and John W. Draper), states that light must be absorbed by a chemical substance in order for a photochemical reaction to take place.
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A plastic bucket used as an open-air flowerpot photodegraded after some years. Photodegradation is the alteration of materials by light. Commonly, the term is used loosely to refer to the combined action of sunlight and air, which cause oxidation and hydrolysis.