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ray, in physics

(Encyclopedia)ray, in physics, term denoting the straight line along which light or other form of radiation is propagated from its source. It generally refers to the line of propagation of waves but is also applied...

cathode-ray tube

(Encyclopedia)CE5 Cathode-ray tube cathode-ray tube (CRT), special-purpose electron tube in which electrons are accelerated by high-voltage anodes, formed into a beam by focusing electrodes, and projected towar...

X-ray astronomy

(Encyclopedia)X-ray astronomy, study of celestial objects by means of the X rays they emit, in the wavelength range from 0.01 to 10 nanometers. X-ray astronomy dates to 1949 with the discovery that the sun emits X ...

X-ray crystallography

(Encyclopedia)X-ray crystallography, the study of crystal structures through X-ray diffraction techniques. When an X-ray beam bombards a crystalline lattice in a given orientation, the beam is scattered in a defini...

Montagu, Elizabeth (Robinson)

(Encyclopedia)Montagu, Elizabeth (Robinson), 1720–1800, English author, one of the bluestockings. She was noted for her wit and beauty, and her London literary salon was frequented by Johnson, Walpole, Burke, and...

Luce, Henry Robinson

(Encyclopedia)Luce, Henry Robinson, 1898–1967, American publisher, b. Tengchow (now Penglai), China, the son of a Presbyterian missionary. After studying at Yale and Oxford, he worked (1921–22) as a reporter on...

Koch, Frederick Robinson

(Encyclopedia)Koch, Frederick Robinson: see under Koch, family. ...

Gifford, Sanford Robinson

(Encyclopedia)Gifford, Sanford Robinson, 1823–80, American painter, b. Greenfield, N.Y. A major painter of the American movement known as luminism, Gifford, who was influenced by Thomas Cole early in his career, ...

Delany, Martin Robinson

(Encyclopedia)Delany, Martin Robinson dəlāˈnē [key], 1812–85, American black leader, b. Charles Town, Va. (now in West Virginia). The son of free blacks, he attended a black school in Pittsburgh and studied m...

Robinson, Arthur Howard

(Encyclopedia)Robinson, Arthur Howard, 1915–2004, American cartographer, b. Montreal to American parents, Ph.D Ohio State Univ., 1947. The head of the map division of the Office of Strategic Services for much of ...