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Carl Pulfrich
Carl Pulfrich (September 24, 1858, Burscheid, Rhine Province – August 12, 1927) was a German physicist, noted for advancements in optics made as a researcher for the Carl Zeiss company in Jena around 1880, and for documenting the Pulfrich effect, a psycho-optical phenomenon that can be used to create a type of 3-D visual effect.
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