RÖNTGEN RAYS


RÖNTGEN RAYS
   described by Dr. Knott as "rays of light that pass with ease through many substances that are optically opaque, but are absorbed by others." "For example," he says, "the bony structures of the body are much less transparent than the fleshy parts; hence by placing the hand between a fluorescent screen and the source of these rays we see the shadow of the skeleton of the hand with a much fainter shadow of the flesh and skin bordering it." See Dr. Knott's "Physics."

The Nuttall Encyclopaedia. . 1907.

Look at other dictionaries:

  • röntgen —   , roentgen   n. unit of dose of ionising radiation, e.g. X rays or gamma rays.    ♦ röntgen rays, n.   pl. X rays.    ♦ röntgenogram,    ♦ röntgenograph, n. X ray photograph.    ♦ röntgenology,   n. radiology.    ♦ röntgenoscopy n. X ray… …   Dictionary of difficult words

  • RÖNTGEN, WILHELM KONRAD VON —    discoverer of the Röntgen rays, born at Lennep, in Rhenish Prussia; since 1885 has been professor of Physics at Würzburg; his discovery of the X rays was made in 1898, and has won him a wide celebrity; b. 1845 …   The Nuttall Encyclopaedia

  • Rontgen ray — R[ o]ntgen ray, Roentgen ray Roentgen ray [see {R[ o]ntgen}.] (Physics) An {X ray}; originally, the term was applied to any of the rays produced when cathode rays strike upon surface of a solid (as the wall of the vacuum tube), but now it refers… …   The Collaborative International Dictionary of English

  • Rontgen — R[ o]nt gen, Roentgen Roent gen, a. Of or pertaining to the German physicist Wilhelm Konrad R[ o]ntgen, or the rays discovered by him; as, R[ o]ntgen apparatus. [Webster 1913 Suppl.] …   The Collaborative International Dictionary of English

  • Röntgen , Wilhelm Conrad — (1845–1923) German physicist Röntgen, who was born at Lennep in Germany, received his early education in the Netherlands; he later studied at the Federal Institute of Technology, Zurich. After receiving his doctorate in 1869 for a thesis on… …   Scientists

  • Röntgen, Wilhelm Conrad — or Wilhelm Conrad Roentgen born March 27, 1845, Lennep, Prussia died Feb. 10, 1923, Munich, Ger. German physicist. He taught at the Universities of Giessen (1879–88), Würzburg (1888–1900), and Berlin (1900–20). In 1895 he discovered rays that did …   Universalium

  • Röntgen-Strahlen — Röntgenstrahlung bezeichnet elektromagnetische Wellen einer Photonenenergie zwischen ungefähr 100 eV und 250 keV und von Wellenlängen zwischen 10 8 und 10 12 m. Röntgenstrahlen liegen im elektromagnetischen Spektrum zwischen dem ultravioletten… …   Deutsch Wikipedia

  • Röntgen-Strahlung — Röntgenstrahlung bezeichnet elektromagnetische Wellen einer Photonenenergie zwischen ungefähr 100 eV und 250 keV und von Wellenlängen zwischen 10 8 und 10 12 m. Röntgenstrahlen liegen im elektromagnetischen Spektrum zwischen dem ultravioletten… …   Deutsch Wikipedia

  • Röntgen — For other uses of röntgen or roentgen , see RoentgenThe röntgen or roentgen (symbol R) is a unit of measurement for ionizing radiation (such as X ray and gamma rays), and is named after the German physicist Wilhelm Röntgen. 1 R is the amount of… …   Wikipedia

  • Röntgen — Historisches Röntgengerät Röntgen (nach dem Physiker Wilhelm Conrad Röntgen), auch Röntgendiagnostik steht für den Prozess des Durchstrahlens eines Körpers mit Röntgenstrahlen unter Verwendung eines Röntgenstrahlers sowie die Darstellung der… …   Deutsch Wikipedia


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