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infrared radiation

(Encyclopedia)infrared radiation, electromagnetic radiation having a wavelength in the range from c.75 × 10−6 cm to c.100,000 × 10−6 cm (0.000075–0.1 cm). Infrared rays thus occupy that part of the electrom...

Welles, Orson

(Encyclopedia)Welles, Orson, 1915–85, American actor, director, and producer, b. Kenosha, Wis. From childhood he evinced a precocious talent and lofty sense of self-assurance in theatrical matters. He began actin...

atomic clock

(Encyclopedia)atomic clock, electric or electronic timekeeping device that is controlled by atomic or molecular oscillations. A timekeeping device must contain or be connected to some apparatus that oscillates at a...

Dresden

(Encyclopedia)Dresden drĕzˈdən [key], city, capital of Saxony, E central Germany, on the Elbe River. It ...

Roosevelt, Eleanor

(Encyclopedia)Roosevelt, Eleanor (Anna Eleanor Roosevelt) rōˈzəvĕlt [key], 1884–1962, American humanitarian, b. New York City. The daughter of Elliott Roosevelt and niece of Theodore Roosevelt, she was an act...

vaudeville

(Encyclopedia)vaudeville vôdˈvĭl [key], originally a light song, derived from the drinking and love songs formerly attributed to Olivier Basselin and called Vau, or Vaux, de Vire. Similar to the English music ha...

smart card

(Encyclopedia)smart card, small device that resembles a credit card but contains an embedded microprocessor to store and process information. Magnetic-stripe cards, which store a very small amount of information (m...

Stoppard, Tom

(Encyclopedia)Stoppard, Tom, 1937–, English playwright, b. Zlín, Czechoslovakia (now in the Czech Republic), as Tomas Straussler. During his childhood he and his family moved to Singapore, later (1946) settling ...

Milky Way

(Encyclopedia)CE5 Position of the sun in the Milky Way Milky Way, the galaxy of which the sun and solar system are a part, seen as a broad band of light arching across the night sky from horizon to horizon; if ...

space probe

(Encyclopedia)space probe, space vehicle carrying sophisticated instrumentation but no crew, designed to explore various aspects of the solar system (see space exploration). Unlike an artificial satellite, which is...