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Leicestershire

(Encyclopedia)Leicestershire lĕsˈtərshĭr [key], county (1991 pop. 860,500), 832 sq mi (2,155 sq km), central England. The county seat is at Glenfield; it was formerly Leicester, which is now administratively se...

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 ...

Saint Joseph, cities, United States

(Encyclopedia)Saint Joseph sānt jōˈzəf [key]. 1 City (1990 pop. 9,214), seat of Berrien co., SW Mich., a port on Lake Michigan at the mouth of the St. Joseph River across from Benton Harbor; inc. 1834. Located ...

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...

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...

Ekimov, Alexei

(Encyclopedia)Alexei Ekimov, 1945– , b. Leningrad, USSR, Russian physicist, studied at Leningrad State University and Ioffe Institute of the Russian Academy of Scie...

Diaz, Armando

(Encyclopedia)Diaz, Armando ärmänˈdō dēˈäts [key], 1861–1928, Italian field marshal. In World War I he replaced (1917) Cadorna as chief Italian commander. He defeated (1918) the disintegrating Austro-Hunga...