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Media > Cinema-television > RCA 1939 1939 RCA includes a demonstration of projection television in its pavilion at the World's Fair in New York. ![]() [Photo: RCA] The projector uses a high-power five-inch cathode ray tube and a magnifying optical system capable of projecting images onto a specially-coated reflective screen four feet wide by three feet high but capable of going up to seven feet wide by five feet high. Page updated 11 April 2008
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