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Amenhotep III

(Encyclopedia)Amenhotep III ăˌmĕnōˈfĭs [key], d. c.1372 b.c., king of ancient Egypt, of the XVIII dynasty. He succeeded his father, Thutmose IV, c.1411 b.c. His reign marks the culmination and the start of th...

Rommel, Erwin

(Encyclopedia)Rommel, Erwin ĕrˈvēn rômˈəl [key], 1891–1944, German field marshal. He entered the army in 1910 and rose slowly through the ranks. In 1939, Adolf Hitler made him a general. Rommel brilliantly ...

Shannon, Claude Elwood

(Encyclopedia)Shannon, Claude Elwood, 1916–2001, American applied mathematician, b. Gaylord, Michigan. A student of Vannevar Bush at the Massachusetts Institute of Technology (MIT), he was the first to propose th...

Roberts, Frederick Sleigh, 1st Earl Roberts of Kandahar

(Encyclopedia)Roberts, Frederick Sleigh, 1st Earl Roberts of Kandahar kăndəhärˈ [key], 1832–1914, British field marshal. He joined the Bengal artillery in 1851 and fought with distinction in the Indian Mutiny...

synchrotron radiation

(Encyclopedia)synchrotron radiation, in physics, electromagnetic radiation emitted by high-speed electrons spiraling along the lines of force of a magnetic field (see magnetism). Depending on the electron's energy ...

electromagnetic radiation

(Encyclopedia)CE5 Electromagnetic spectrum electromagnetic radiation, energy radiated in the form of a wave as a result of the motion of electric charges. A moving charge gives rise to a magnetic field, and if ...

relativity

(Encyclopedia)relativity, physical theory, introduced by Albert Einstein, that discards the concept of absolute motion and instead treats only relative motion between two systems or frames of reference. One consequ...

Levi-Civita, Tullio

(Encyclopedia)Levi-Civita, Tullio to͞olˈlyō lāˈvē-chēˈvētä [key], 1873–1942, Italian mathematician. He taught at the universities of Padua (1898–1919) and Rome (1919–38) and was noted for his resear...

Louis, Morris

(Encyclopedia)Louis, Morris, 1912–62, American painter, b. Baltimore. A practitioner of color-field painting, Louis was noted for soaking poured paint through unsized and often unstretched canvas. Prior to 1960 h...

Mandan, city, United States

(Encyclopedia)Mandan mănˈdăn, –dən [key], city (1990 pop. 15,177), seat of Morton co., S N.Dak., on the Missouri River opposite Bismarck; inc. 1881. A railroad division point, it is the distribution center fo...