Columbia Encyclopedia
Search results
500 results found
sideband
(Encyclopedia)sideband, any frequency component of a modulated carrier wave other than the frequency of the carrier wave itself, i.e., any frequency added to the carrier as a result of modulation; sidebands carry t...Salonen, Esa-Pekka
(Encyclopedia)Salonen, Esa-Pekka, 1958–, Finnish conductor and composer. Originally a French horn player, he studied (1973–77) at Helsinki's Sibelius Academy. He made his conducting debut (1979) with the Finnis...solar energy
(Encyclopedia)solar energy, any form of energy radiated by the sun, including light, radio waves, and X rays, although the term usually refers to the visible light of the sun. Solar energy is needed by green plants...Mauna Kea Observatories
(Encyclopedia)Mauna Kea Observatories mouˈnə kāˈə [key], astronomical observatory complex located on Mauna Kea peak, the “white mountain” on the island of Hawaii, at an altitude of more than 13,600 ft (4,1...propaganda
(Encyclopedia)propaganda, systematic manipulation of public opinion, generally by the use of symbols such as flags, monuments, oratory, and publications. Modern propaganda is distinguished from other forms of commu...Hertzsprung, Ejnar
(Encyclopedia)Hertzsprung, Ejnar īˈnär hĕrtsˈspro͞ong [key], 1873–1967, Danish astronomer. Although trained as a chemical engineer, Hertzsprung made his career in astronomy, specializing in exacting photogr...Museum of Television and Radio
(Encyclopedia)Museum of Television and Radio: see Paley Center for Media. ...Radio Frequencies (table)
(Encyclopedia)Radio FrequenciesWinchell, Walter
(Encyclopedia)Winchell, Walter, 1897–1972, journalist and broadcaster, b. New York City as Walter Winchel. He performed in vaudeville, and adopted a marquee's misspelling of his surname. After serving two years i...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...Browse by Subject
- Earth and the Environment +-
- History +-
- Literature and the Arts +-
- Medicine +-
- People +-
- Philosophy and Religion +-
-
Places
+-
- Africa
- Asia
- Australia and Oceania
- Britain, Ireland, France, and the Low Countries
- Commonwealth of Independent States and the Baltic Nations
- Germany, Scandinavia, and Central Europe
- Latin America and the Caribbean
- Oceans, Continents, and Polar Regions
- Spain, Portugal, Italy, Greece, and the Balkans
- United States, Canada, and Greenland
- Plants and Animals +-
- Science and Technology +-
- Social Sciences and the Law +-
- Sports and Everyday Life +-
