Other Aspects of Photography
In the contemporary world the practical applications of the photographic medium are legion: it is an important tool in education, medicine, commerce, criminology, and the military. Its scientific applications include aerial mapping and surveying, geology, reconnaissance, meteorology, archaeology, and anthropology. New techniques such as holography, a means of creating a three-dimensional image in space, continue to expand the medium's technological and creative horizons. In astronomy the charge coupled device (CCD) can detect and register even a single photon of light.
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