Columbia Encyclopedia

(Encyclopedia) blackbody, in physics, an ideal black substance that absorbs all and reflects none of the radiant energy falling on it. Lampblack, or powdered carbon, which reflects less than 2% of the radiation fall...

(Encyclopedia) Maximilian, prince of Baden (Max of Baden), 1867–1929, German statesman, last chancellor of imperial Germany. A liberal, he was made imperial chancellor at the end of World War I as Germany neared d...

(Encyclopedia) Coblentz, William Weber kōˈblĕnts [key], 1873–1962, American physicist, b. North Lima, Ohio, grad. Case School of Applied Science (B.S., 1900) and Cornell (Ph.D., 1903). From 1905 to 1945 he was ...

(Encyclopedia) photon fōˈtŏn [key], the particle composing light and other forms of electromagnetic radiation, sometimes called light quantum. The photon has no charge and no mass. About the beginning of the 20th...

(Encyclopedia) Dekker, Eduard Douwes məltätüˈlē [key], 1820–87, Dutch novelist. His experiences in the Dutch colonial service in Java (1838–57) made him an ardent advocate of reform in colonial administrati...

(Encyclopedia) photoelectric effect, emission of electrons by substances, especially metals, when light falls on their surfaces. The effect was discovered by H. R. Hertz in 1887. The failure of the classical theory ...

(Encyclopedia) Deutsches Theater doiˈchəs tāäˈtər [key], German private theater organization founded in 1883. Under its first director, Adolph L'Arronge, the Deutsches merged with the Freie Bühne (Otto Brahm,...

(Encyclopedia) Cecil, Lord David sĭsˈəl, sĕs– [key] (Lord Edward Christian David Gascoyne Cecil), 1902–86, English biographer. He was professor of English literature at Oxford (1948–70). Cecil's works are ...

(Encyclopedia) Müller, Friedrich Maximilian: see Müller, Max. ...

(Encyclopedia) Ophüls, Marcel: see under Ophüls, Max. ...