1. A Science Odyssey: People And Discoveries: Niels Bohr Niels Bohr. 1885 1962. Niels Bohr was born and educated in Copenhagen, Denmark. He lived, worked, and died there, too. But his mark on science and history was worldwide. http://www.pbs.org/wgbh/aso/databank/entries/bpbohr.html

Niels Bohr Niels Bohr was born and educated in Copenhagen, Denmark. He lived, worked, and died there, too. But his mark on science and history was worldwide. His professional work and personal convictions were part of the larger stories of the century. At the University of Copenhagen, he studied physics and played soccer (though not as well as his brother, who helped the 1908 Danish soccer team win an Olympic silver medal). After receiving his doctorate in 1911, Bohr traveled to England on a study grant and worked under J.J. Thomson, who had discovered the electron 15 years earlier. Bohr began to work on the problem of the atom's structure. Ernest Rutherford had recently suggested the atom had a miniature, dense nucleus surrounded by a cloud of nearly weightless electrons. There were a few problems with the model, however. For example, according to classical physics, the electrons orbiting the nucleus should lose energy until they spiral down into the center, collapsing the atom. Bohr proposed adding to the model the new idea of quanta put forth by Max Planck in 1901. That way, electrons existed at set levels of energy, that is, at fixed distances from the nucleus. If the atom absorbed energy, the electron jumped to a level further from the nucleus; if it radiated energy, it fell to a level closer to the nucleus. His model was a huge leap forward in making theory fit the experimental evidence that other physicists had found over the years. A few inaccuracies remained to be ironed out by others over the next few years, but his essential idea was proved correct. He received the Nobel Prize for this work in 1922, and it's what he's most famous for. But he was only 37 at the time, and he didn't stop there. Among other things, he put forth the theory of the nucleus as a liquid drop, and the idea of "complementarity" that things may have a dual nature (as the electron is both particle and wave) but we can only experience one aspect at a time.

2. Niels Bohr Niels Bohr. Niels Bohr born Oct. 7, 1885, Copenhagen, Den. d. Nov. 18, 1962, Copenhagen in full NIELS HENRIK DAVID BOHR Danish http://www.crystalinks.com/bohr.html

Niels Bohr Niels Bohr - born Oct. 7, 1885, Copenhagen, Den. d. Nov. 18, 1962, Copenhagen in full NIELS HENRIK DAVID BOHR Danish physicist who was the first to apply the quantum theory, which restricts the energy of a system to certain discrete values, to the problem of atomic and molecular structure. For this work he received the Nobel Prize for Physics in 1922. He developed the so-called Bohr theory of the atom and liquid model of the atomic nucleus. Early life  Bohr's father, Christian Bohr, professor of physiology at the University of Copenhagen, was known for his work on the physical and chemical aspects of respiration. His mother, Ellen Adler Bohr, came from a wealthy Jewish family prominent in Danish banking and parliamentary circles. Bohr's scientific interests and abilities were evident early, and they were encouraged and fostered in a warm, intellectual family atmosphere. Niels's younger brother, Harald, became a brilliant mathematician. Bohr distinguished himself at the University of Copenhagen, winning a gold medal from the Royal Danish Academy of Sciences and Letters for his theoretical analysis of and precise experiments on the vibrations of water jets as a way of determining surface tension. In 1911 he received his doctorate for a thesis on the electron theory of metals that stressed the inadequacies of classical physics for treating the behaviour of matter at the atomic level. He then went to England, intending to continue this work with Sir J.J. Thomson at Cambridge.

3. Bohr Niels Bohr. 1922 Niels Henrik David Bohr, a Danish physicist and Nobel laureate, made basic contributions to nuclear physics and the understanding of atomic structure. http://www.newlisbon.k12.wi.us/physicists/bohr.html

Niels Bohr Niels Henrik David Bohr, a Danish physicist and Nobel laureate, made basic contributions to nuclear physics and the understanding of atomic structure. Bohr's theory of atomic structure, for which he received the Nobel Prize in physics in 1922, was published in papers between 1913 and 1915. His work drew on Rutherford's nuclear model of the atom, in which the atom is seen as a compact nucleus surrounded by a swarm of much lighter electrons. Bohr's atomic model made use of quantum theory and the Planck constant (the ratio between quantum size and radiation frequency). The model suggested that an atom emits electromagnetic radiation only when an electron in the atom jumps from one quantum level to another. This model contributed enormously to future developments of theoretical atomic physics. In 1916 Bohr went to the University of Copenhagen as a professor of physics, and in 1920 he was made director of the university's newly formed Institute for Theoretical Physics. There Bohr developed a theory relating quantum numbers to large systems that follow classical laws, and made other major contributions to theoretical physics. His work helped lead to the concept that electrons exist in shells and that the electrons in the outermost shell determine an atom's chemical properties. He also served as a visiting professor at many universities. In 1939, recognizing the significance of the fission experiments of the German scientists Otto Hahn and Fritz Strassmann, Bohr convinced physicists at a scientific conference in the U.S. of the importance of those experiments. He later demonstrated that uranium-235 is the particular isotope of uranium that undergoes nuclear fission. Bohr then returned to Denmark, where he was forced to remain after the German occupation of the country in 1940. Eventually, however, he was able to escape to Sweden, under peril of his life and that of his family. From Sweden the Bohrs traveled to England and eventually to the United States, where Bohr joined in the effort to develop the first atomic bomb, working at Los Alamos, New Mexico, until the first bomb's detonation in 1945. He opposed complete secrecy of the project, however, and feared the consequences of this ominous new development. He desired international control.

4. Biographies Info Science : Bohr Niels Translate this page nouvelle recherche, bohr niels Physicien Le père de Niels Bohr est professeur de physiologie mais il se passionne pour la physique. Réalisant http://www.infoscience.fr/histoire/biograph/biograph.php3?Ref=11

5. WIEM: Bohr Niels Henrik David bohr niels Henrik David (18851962), fizyk dunski, jeden z najwybitniejszych fizyków XX wieku, uczen JJ Thomsona i E. Rutherforda. Od 1916 http://wiem.onet.pl/wiem/00a3da.html

WIEM 2004 - zobacz now± edycjê encyklopedii! Kup abonament i encyklopediê na CD-ROM, sprawd¼ ofertê cenow±! Oferta specjalna abonamentów dla szkó³ i instytucji! Uwaga! Przedstawione poni¿ej has³o pochodzi z archiwalnej edycji WIEM 2001! Prace redakcyjne nad edycj± 2001 zosta³y zakoñczone. Zapraszamy do korzystania z nowej, codziennie aktualizowanej i wzbogacanej w nowe tre¶ci edycji WIEM 2004 Fizyka, Dania Bohr Niels Henrik David Modele budowy atomu Bohr Niels Henrik David (1885-1962), fizyk duñski, jeden z najwybitniejszych fizyków XX wieku, uczeñ J.J. Thomsona i  E. Rutherforda . Od 1916 prof. uniwersytetu w Kopenhadze, za³o¿yciel i pierwszy dyrektor (1920-62) Instytutu Fizyki Teoretycznej w Kopenhadze (obecnie jego imienia). Jeden z twórców mechaniki kwantowej , 1913 opracowa³ pierwszy kwantowy, uproszczony model budowy atomu (Bohra model atomu). Za badania nad struktur± atomu i mechanizmem promieniowania ¶wiat³a otrzyma³ 1922 Nagrodê Nobla . By³ za³o¿ycielem i centraln± postaci± tzw. szko³y kopenhaskiej mechaniki kwantowej oraz interpretacji filozoficznej teorii kwantów (g³. oponentem tej szko³y by³ A. Einstein

6. Niels Henrik David Bohr Niels Henrik David Bohr. The Danish physicist Niels Henrik David Bohr, b. Oct. 7, 1885, d. Nov. 18, 1962, is known primarily for http://www.phy.hr/~dpaar/fizicari/xbohr.html

Niels Henrik David Bohr The Danish physicist Niels Henrik David Bohr, b. Oct. 7, 1885, d. Nov. 18, 1962, is known primarily for his pioneering work in the field of atomic theory. Bohr was born in Copenhagen and was educated at the University of Copenhagen at the time when Max Planck had just begun the development of quantum mechanics. After completing his dissertation on the electron theory of metals in 1911, Bohr went briefly to Cambridge and then on to Manchester, England. There he worked under Ernest Rutherford, who in 1911 had published the theory that the atom consisted of a central nucleus orbited by electrons. The problem with this model was that, according to classical electrodynamic theory, the electrons should radiate and therefore lose energy and spiral into the nucleus. With the problem of atomic structure in mind, Bohr worked in Manchester relentlessly from May through July of 1912 and succeeded in obtaining a formula correctly describing the absorption of helium nuclei by other atomic nuclei. His guiding notion was that the energy lost by a helium nucleus in flying through an atom depends not on the size of the atom but rather on the distances between the nucleus and the various electrons in the atom. In 1916, Bohr was appointed professor of theoretical physics at the University of Copenhagen, and in 1922 he was awarded the Nobel Prize for physics. In the following decades he continued to work on the implications of his theory, notably putting an earlier knowledge of surface tension to use in his "droplet model" of the nucleus, which treats the nucleus as if it were a water droplet held together by its surface tension.

7. Bohr Niels Niels Bohr est le père de Aage Bohr. Il a http://www.lyc-dautet-larochelle.ac-poitiers.fr/l-jv-larochelle/site_eleves_2/Pa

Bohr , Niels Né en 1885 et mort en Copenhague en 1962 Nationalité danoise Physicien Niels Bohr est le père de Aage Bohr Planck et le modèle planétaire de Rutherford Einstein refusait. Il a reçu le prix Nobel de physique en 1922. sur internet... Sur le site des Prix Nobel : http://www.nobel.se/ Un autre site consacré aux prix Nobel : http://www.almaz.com/nobel/ Les grands chimistes : http://www.chm.ulaval.ca/gchimistes/gchimistes.html Cyberscol : http://mendeleiev.cyberscol.qc.ca/chimisterie/listecc.html cliquez sur un des boutons ci-dessus pour visiter l'un de nos menus de recherche

8. MSN Encarta - Résultats De La Recherche - Bohr Niels bohr niels . Page 1 sur 1. Biographies Info Science bohr niels Page d affichage des biographies d Info Science http://fr.encarta.msn.com/Bohr_Niels.html

Accueil MSN Mon MSN Hotmail Rechercher ... S'abonner   Encarta Premium Rechercher Encarta R©sultats de la recherche pour "Bohr Niels" Page sur 1 R©serv© aux abonn©s MSN Encarta Premium. Bohr, Niels Encyclop©die EncartaArticle Bohr, Niels (1885-1962), physicien danois connu pour sa contribution   la physique nucl©aire et   la compr©hension de la structure de l’atome et   l’... Niels Bohr Encyclop©die EncartaImage magn©tisme (physique) Encyclop©die EncartaArticle Trouv© dans l'article magn©tisme (physique) Einstein, Albert Encyclop©die EncartaArticle Trouv© dans l'article Einstein, Albert atome Encyclop©die EncartaArticle Trouv© dans l'article atome chimie physique Encyclop©die EncartaArticle Trouv© dans l'article chimie physique physique Encyclop©die EncartaArticle Trouv© dans l'article physique classification p©riodique Encyclop©die EncartaArticle Trouv© dans l'article classification p©riodique spectroscopie Encyclop©die EncartaArticle Trouv© dans l'article spectroscopie Danemark Encyclop©die EncartaArticle Trouv© dans l'article Danemark chimie Encyclop©die EncartaArticle Trouv© dans l'article chimie Heisenberg, Werner Karl

9. Bohr Niels Henrik David From FOLDOC bohr niels Henrik David. history of science, philosophy of science danish physicist (18851962). Although best known for his contributions http://www.swif.uniba.it/lei/foldop/foldoc.cgi?Bohr Niels Henrik David

10. Niels Bohr Niels Bohr Was Born In Copenhagen, He Is The Son O... Niels bohr niels Bohr was born in Copenhagen, he is the son of a physiology professor, and went to school at the University of Copenhagen, this is wher http://www.instant-essays.com/chemistry/niels-bohr.shtml

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11. BOHR Niels Henrik David Niels Henrik David Bohr byl dánský fyzik, žijící v letech 1885 1962. Byl clenem mnoha akademií ved v zahranicí, od roku http://www.volny.cz/michal_bachman/bohr.htm

Last updated: 25.05.2001 14:28:24 Obrazová galerie BOHR Niels - ENGLISH Niels Henrik David Bohr byl dánský fyzik, žijící v letech 1885 - 1962. Byl èlenem mnoha akademií vìd v zahranièí, od roku 1961 èestným profesorem Lomonosov ovy univerzity v Moskvì, byl jedním z nejvýznamìjších vìdcù 20. století. V roce 1922 obdržel Nobelovu cenu za výzkumy a model atomu. Pøestože o Bohrovu modelu atomu bývá v souèasných uèebnicích jen historická zmínka, nic to neubírá na významu Bohrovy teorie. Ta ve své dobì spojila dva hlavní smìry fyziky - nìmecký teoretický v èele s M. Planckem a A. Einsteinem a anglický experimentální v èele s J.J. Thomsonem a E. Rutherfordem. Optimální rozlišení - 1024x768, minimálnì 800x600. © Michal Bachman, 200 Veškeré ohlasy prosím sem

12. BOHR  Niels - ENGLISH Last updated 05.08.2001 063402. Niels Bohr was born in Copenhagen in Denmark in 1885. His father was a professor of physiology http://www.volny.cz/michal_bachman/bohren.htm

Last updated: 05.08.2001 06:34:02 Niels Bohr was born in Copenhagen in Denmark in 1885. His father was a professor of physiology at the University of Copengagen. Niels attended the same university and was a distinguished soccer player as well as a brilliant student. Bohr studied at J. J. Thomson ´s Cavendish Laboratory and at Rutherford ´s laboratory. At the young age of 28, while working with Rutherford, he invented the first effective model and theory of the structure of the atom. His work ranks as one of the truly great examples of an imaginative mind at work. He was awarded the 1922 Nobel Prize for physics for his study of the structure of atoms. During Worls War 2, Bohr and his family escaped from occupied Denmark to the United States. He and his son, Aage, acted as advisers at the Los Alomos Atomic Laboratories, where the atom bomb was developed. Thereafter, Bohr concerned himself with developing peaceful uses of nuclear energy. Aage Bohr, Neil´s son was awarded the Nobel Prize for physics in 1975. Optimální rozlišení - 1024x768, minimálnì 800x600.

13. Niels Bohr Niels Bohr Fysiker. Ändra sidan Visa ditt intresse Ämne 1568, v1 Status normal. Alias bohr, niels. normal Text 29738, v1. Fysiker. Personer. http://paranormal.se/topic/niels_bohr.html

Niels Bohr Fysiker Ändra sidan Visa ditt intresse Ämne 1568, v1 - Status: normal. Denna text är importerad från /old/person/bohr_n.html är Fysiker Alias: bohr, niels normal Text 29738 Fysiker Personer Hjälpare Diskutanter Söker kontakt Redaktörer Sök Detta är en sida från webbplatsen PARANORMAL.SE . Materialet kommer från flera olika författare och medarbetare. Du kan vara en del av denna webbplats Hem Logga in Index ... Hjälp

14. Niels Bohr bohr niels. Broad,W. Teller s War. 1992 (30, 32); New York Times 199404-19 (A5); New York Times 1994-05-03 (A15); New York Times 2002-01-07 (A14); http://www.namebase.org/xblu/Niels-Bohr.html

BOHR NIELS Broad,W. Teller's War. 1992 New York Times New York Times New York Times ... Quigley,C. Tragedy and Hope. 1966 pages cited this search: 9 Order hard copy of these pages Show a social network diagram for this name Try another NameBase search Back to home page

15. Niels Bohr [Pictures And Photos Of] of Kingston, Ontario, Canada; Niels Bohr; Hugh Everett, 3rd of Alexandria, VA; David K. Harrison of Belmont, MA., probably in Princeton Chapel; bohr niels D10. http://www.aip.org/history/esva/catalog/esva/Bohr_Niels.html

A larger image of any photo may be purchased. Click on an image to place an order. For more information visit our home page Aage Niels Bohr Description middle age ; full-face ; eyeglasses ; smiling Item ID Bohr A A1 Aage Niels Bohr Description young ; full-face ; suit ; eyeglasses Item ID Bohr A A2 Aage Niels Bohr Description young ; suit ; smiling ; riding a bicycle ; outdoors Item ID Bohr A B1 Aage Niels Bohr, Niels Henrik David Bohr Description L-R: Aage Bohr, father Niels Bohr ; standing ; inspecting a camera ; outdoors Item ID Bohr A C5 Aage Niels Bohr Description middle age; profile; shirt; eyeglasses; smiling; reclining; outdoors; Aage Bohr at Roskilde, Denmark, June 1972 Item ID Bohr Aage B3 Aage Niels Bohr Description old age; full-face; eyeglasses; suit; sitting; smiling; hands clasped; house; outdoors Item ID Bohr Aage B4 Aage Niels Bohr, Ben Mottelson Description sitting; eyeglasses; suit; viewing paper; L-R Aage Bohr, Ben Mottelson; Bohr and Mottelson on a train to Oslo for skiing in Norway. Item ID Bohr Aage C10 Aage Niels Bohr, Norton M. Hintz

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Niels Bohr: Niels Bohr Discussion Deck If ye would like to moderate the Niels Bohr Discussion Deck, please drop becket@jollyroger.com The World's Largest Literary Cafe: Carolinanavy.com Carolinanavy.com Nantuckets.com ... The World's Largest Literary Cafe: Carolinanavy.com Posted by Becky on October 13, 19101 at 15:36:20: I just need a few things about Niels Bohr. Very brief and everything. These are the topics, if you can help, please do, thank you so much: ~ the Atomic Emission Spectrum ~ Bohr's explanation * ~ Energy Levels ~ Distance between levels ~ Ground State ~ Excited State Follow Ups: Post a Followup Name: E-Mail: Subject: Comments: : I just need a few things about Niels Bohr. Very brief and everything. These are the topics, if you can help, please do, thank you so much: : ~ the Atomic Emission Spectrum : ~ Bohr's explanation * : ~ Energy Levels : ~ Distance between levels : ~ Ground State : ~ Excited State Optional Link URL: Link Title: Optional Image URL: Follow Ups Post Followup Niels Bohr Discussion Deck The Jolly Roger ... The World's Largest Literary Cafe : Carolinanavy.com ] Carolinanavy.com

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Niels Bohr: Niels Bohr Discussion Deck If ye would like to moderate the Niels Bohr Discussion Deck, please drop becket@jollyroger.com //Required //var site = '681666'; //var mnum = '139010'; //Not Required var max_words = 3; var max_links_per_word = 4; var link_color = '0107A1'; var boxbg_color = 'FFFAEA'; var boxtitle_color = 'black'; var boxdesc_color = 'black'; var boxurl_color = 'red'; DR. ELLIOT'S NORTH AMERICAN GREAT BOOKS TOURCOMING TO A BOOK STORE NEAR YOU WRITER S WORD.COM: Open Source CMS][ ... The World's Largest Literary Cafe: Carolinanavy.com Posted by Niels Bohr on November 11, 19103 at 22:40:29: Niels Bohr Follow Ups: Post a Followup Name: E-Mail: Subject: Comments: : Niels Bohr Optional Link URL: Link Title: Optional Image URL: Follow Ups Post Followup Niels Bohr Discussion Deck The Jolly Roger ... The World's Largest Literary Cafe : Carolinanavy.com ] Carolinanavy.com Nantuckets.com BusinessPhilosophy.com Classicals.com ... SEARCH Niels Bohr Niels Bohr: Discussion Deck Niels Bohr Discussion Deck If ye would like to moderate the Niels Bohr Discussion Deck, please drop

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20. Gene@Star - Généalogies Celebres Sur Le Net Translate this page toute responsabilité quant à leur contenu. bohr niels ( 1922 - ) Physicien danois, Prix Nobel en 1922 Onomastique non disponible http://www.geneastar.org/fr/perso.php3?metier=inventeur&nom=bohr

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