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Photography

Art, science and practice of creating durable images by recording light or other electromagnetic radiation

Photography is the art, application, and practice of creating durable images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film. It is employed in many fields of science, manufacturing (e.g., photolithography), and business, as well as its more direct uses for art, film and video production, recreational purposes, hobby, and mass communication.

Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure. With an electronic image sensor, this produces an electrical charge at each pixel, which is electronically processed and stored in a digital image file for subsequent display or processing. The result with photographic emulsion is an invisible latent image, which is later chemically "developed" into a visible image, either negative or positive depending on the purpose of the photographic material and the method of processing. A negative image on film is traditionally used to photographically create a positive image on a paper base, known as a print, either by using an enlarger or by contact printing.

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The media on this page is placed in the public domain by New York Public Library, an essential provider of free books, information, ideas, and education for all New Yorkers for more than 100 years. Founded in 1895, NYPL is the nation’s largest public library system, featuring a unique combination of 88 neighborhood branches and four scholarly research centers, bringing together an extraordinary richness of resources and opportunities available to all. Serving more than 17 million patrons a year, and millions more online, the Library holds more than 51 million items, from books, e-books, and DVDs to renowned research collections used by scholars from around the world.

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