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Roentgen ray

(Encyclopedia)Roentgen ray: see X ray.

Röntgen ray

(Encyclopedia)Röntgen ray: see X ray.

Ray, Man

(Encyclopedia)Ray, Man, 1890–1976, American photographer, painter, and sculptor, b. Philadelphia. Along with Marcel Duchamp, Ray was a founder of the Dada movement in New York and Paris. He is celebrated for his ...

Nagin, Ray

(Encyclopedia)Nagin, Ray (Clarence Ray Nagin, Jr.), 1956–, African-American politician, b. New Orleans. A Louisiana cable-television executive before entering politics, Nagin won the 2002 mayoral election handily...

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...

Booth, Edwin

(Encyclopedia)Booth, Edwin, 1833–93, one of the first great American actors and the most famous of his era, b. “Tudor Hall,” near Bel Air, Md. After years of touring with his father, Junius Brutus Booth, serv...

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 ...

gamma-ray astronomy

(Encyclopedia)gamma-ray astronomy, study of astronomical objects by analysis of the most energetic electromagnetic radiation they emit. Gamma rays are shorter in wavelength and hence more energetic than X rays (see...

Klebs, Edwin

(Encyclopedia)Klebs, Edwin klāps [key], 1834–1913, German-American pathologist, b. Prussia. He was an assistant of Rudolf Virchow and professor of pathology at Zürich (1872–92) and from 1896 at Rush Medical C...

Sandys, Edwin

(Encyclopedia)Sandys, Edwin săndz [key], 1516?–1588, English prelate, archbishop of York (1576–88). While a student at Cambridge he turned to Protestantism. On the death (1553) of Edward VI, Sandys supported L...