Peter Mark Roget
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Peter Mark Roget was a British physician, natural theologian, lexicographer, and founding secretary of The Portico Library. He is best known for publishing, in 1852, the Thesaurus of English Words and
Roget c. 1865
Roget plaque, George Square, Edinburgh
Official portrait by Thomas Pettigrew
Persistence of vision
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Persistence of vision or visual persistence is the optical illusion that occurs when the visual perception of an object continues for some time after the rays of light proceeding from it have ceased t
Peter Mark Roget
…thesaurus). In 1824, he read a paper to the Royal Society about a peculiar optical illusion which is often (falsely) regarded as the origin of the ancient persistence of vision theory that was later commonly, yet incorrectly, used to explain apparent motion in film and animation. Peter Mark Roget was born in Broad Street, Soho…
Sparkler's trail effect
Light Painting Screw by Karsten Knöfler
Wood-cut illustration of An Optical Deception (1821)
Illustration plate for Peter Mark Roget's Explanation of an Optical Deception in the Appearance of the Spokes of a Wheel Seen through Vertical Apertures (1825)