1. Biography Center : Biographies Of Wilhelm Conrad Roentgen In Biographies of Roentgen Wilhelm Conrad and, for more detail Biography of , , www.worldofbiography.com/9072%2DWilhelm%20Roentgen/ http://www.biography-center.com/biographies/10099-Roentgen_Wilhelm_Conrad.html

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2. Roentgen, Wilhelm Conrad - MSN Encarta Roentgen, Wilhelm Conrad (18451923), German physicist, the first Nobel laureate in physics, which he achieved for his discovery of X-rays. http://uk.encarta.msn.com/encyclopedia_761555545/roentgen_wilhelm_conrad.html

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3. Roentgen, Wilhelm Conrad - Search View - MSN Encarta To find a specific word, name, or topic in this article, select the option in your Web browser for finding within the page. http://encarta.msn.co.uk/text_761555545__1/Roentgen_Wilhelm_Conrad.html

var s_account="msnportalencartauk"; Search View Roentgen, Wilhelm Conrad Article View To find a specific word, name, or topic in this article, select the option in your Web browser for finding within the page. In Internet Explorer, this option is under the Edit menu. The search seeks the exact word or phrase that you type, so if you don’t find your choice, try searching for a keyword in your topic or recheck the spelling of a word or name. Roentgen, Wilhelm Conrad Roentgen, Wilhelm Conrad (1845-1923), German physicist, the first Nobel laureate in physics, which he achieved for his discovery of X-rays. Roentgen’s first work, published in 1870, dealt with the specific heat of gases, and he also investigated pyroelectrics and the piezoelectric effect, but his name will forever be associated with the discovery of “Roentgen” or X-rays (as he called them). This epoch-making discovery occurred on the evening of November 8, 1895, while experimenting with a Crookes tube in order to study the behaviour of electric currents through gases at extremely low pressure. This research was made possible because of the development of improved vacuum pumps, high-tension induction coils, and discharge tubes by the scientific glass-blower Heinrich Geissler, the physicist William Crookes, and others. Roentgen observed in his dark laboratory the glowing of a fluorescent screen painted with barium platinocyanide placed in the path of the rays of a working Crookes tube which he had covered with black paper in order to exclude light. In a series of classical papers published between 1895 and 1897 he described the main properties of these unknown rays, which he therefore called X-rays. The picture that caught the scientific world by storm was the X-ray photograph of his wife’s hand, taken on December 22, 1895, which clearly showed the structure of the bones and the ring she was wearing. Roentgen demonstrated that the new rays were produced by the impact of cathode rays (electrons) on striking a target, which in Roentgen’s case was the glass envelope of the Crookes tube. It was left to Max von Laue (1879-1960) and his pupils to show that X-rays were a manifestation of highly energetic, invisible electromagnetic radiation.

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8. Roentgen Wilhelm Conrad - WIEM, Darmowa Encyklopedia Wilhelm Conrad Roentgen Roentgen, Röntgen, Wilhelm Conrad (18451923), fizyk niemiecki. Profesor uniwersytetów w Strasburgu, Giessen, Würzburgu http://portalwiedzy.onet.pl/31617,,,,roentgen_wilhelm_conrad,haslo.html

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19. Roentgen - MSN Encarta Roentgen, Wilhelm Conrad (18451923), German physicist, discoverer of X rays, and winner of the first Nobel Prize in physics. Roentgen s discovery of http://encarta.msn.com/encyclopedia_761555545/roentgen.html

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You are here: Open Directory SD701 Open Directory Search: search the entire directory search this category only Top Science Physics Physicists ... Biography of Wilhelm Conrad R¶ntgen [ Kids/Teens/Mature Teens ] - Biographical sketch focuses on the work that led up to R¶ntgen's 1901 acceptance of the Nobel Prize in Physics. Includes photograph and transcript of presentation speech. Encarta: Roentgen, Wilhelm Conrad [ Kids/Teens/Mature Teens ] - Encyclopedia article provides an overview of Roentgen's life and work. Help build the largest human-edited directory on the web. Submit a Site Open Directory Project Become an Editor The content of this directory is based on the Open Directory and may have been modified. Thu, 03 Apr 2008 search special content: How to kill un-needed background processes , makes Windows run faster. fix corrupted Windows XP CD/DVD-ROM drivers? , a quick guide and a historical perspective. QuickTime codecs comparison , A comparison of codecs used in QuickTime, including H.264. How to type special and accented characters Camino Backup QuickPick , Backing up Camino data has never been easier. free from MacCentre701.

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