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Hays, Will H.

(Encyclopedia)Hays, Will H., 1879–1954, American politician and motion-picture executive, b. Sullivan, Ind.; his original name was William Harrison Hays. Hays became active in Indiana political affairs, was chair...

Dreyer, Carl Theodor

(Encyclopedia)Dreyer, Carl Theodor kärl tāˈōdôrˌ drīˈər [key], 1889–1968, Danish motion picture director. He began making films in Denmark in 1919. His Passion of Joan of Arc (1928), widely regarded as a...

harmonic motion

(Encyclopedia)CE5 Harmonic motion is exhibited by a weight vibrating on the end of a spring. In A, the displacement of the object from its equilibrium position and the acceleration of the object are at a maximum...

motion sickness

(Encyclopedia)motion sickness, waves of nausea and vomiting experienced by some people, resulting from the sudden changes in movement of a vehicle. The ailment is also known as seasickness, car sickness, train sick...

retrograde motion

(Encyclopedia)retrograde motion, in astronomy, real or apparent movement of a planet, dwarf planet, moon, asteroid, or comet from east to west relative to the fixed stars. The most common direction of motion in the...

proper motion

(Encyclopedia)proper motion, in astronomy, apparent movement of a star on the celestial sphere, usually measured as seconds of arc per year; it is due both to the actual relative motions of the sun and the star thr...

camera

(Encyclopedia)CE5 Image formed by a camera camera, lightproof box or container, usually fitted with a lens, which gathers incoming light and concentrates it so that it can be directed toward the film (in an opt...

Guy Blache, Alice

(Encyclopedia)Guy Blache or Guy-Blaché, Alice, 1873–1968, French-American filmmaker, b. Paris as Alice Guy. The first woman filmmaker, she directed, produced, wrote screenplays for, or supervised some 1,000 film...

Muybridge, Eadweard

(Encyclopedia)Muybridge, Eadweard ĕdˈwərd mīˈbrĭj [key], 1830–1904, English-born photographer and student of animal locomotion. Muybridge changed his name from Edward James Muggeridge. A gifted and obsessed...

Albemarle Sound

(Encyclopedia)Albemarle Sound, large inland body of generally fresh water, c.55 mi (90 km) long, from 3 to 14 mi (4.8–22 km) wide, NE N.C. Shallow and tideless, the sound is separated from the Atlantic Ocean by a...