1. A Science Odyssey: People And Discoveries: 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. 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 - Wikipedia, The Free Encyclopedia In 1916, Niels Bohr became a professor at the University of Copenhagen, and director of Niels Bohr and his wife Margrethe had six children, one of whom, http://en.wikipedia.org/wiki/Niels_Bohr

Wikimedia needs your help in its 21-day fund drive. See our fundraising page Over US$130,000 has been donated since the drive began on 19 August. Thank you for your generosity! Niels Bohr From Wikipedia, the free encyclopedia. Niels Bohr Niels Henrik David Bohr October 7 November 18 ) was a Danish physicist who made essential contributions to understanding atomic structure and quantum mechanics Contents Bohr's contributions to physics Biography Early years Middle years ... edit Bohr's contributions to physics Bohr's model of atomic structure. The electron's orbital angular momentum is quantized; L=nħ. The theory that electrons travel in discrete orbits around the atom's nucleus , with the chemical properties of the element being largely determined by the number of electrons in the outer orbits. The idea that an electron could drop from a higher-energy orbit to a lower one, emitting a photon (light quantum ) of discrete energy (this became the basis for quantum theory The Copenhagen interpretation of quantum mechanics The principle of complementarity : that items could be separately analyzed as having several contradictory properties.

3. Niels Bohr - Biography Niels bohr niels Henrik David Bohr was born in Copenhagen on October 7, 1885, Niels Bohr was President of the Royal Danish Academy of Sciences, http://nobelprize.org/physics/laureates/1922/bohr-bio.html

HOME SITE HELP ABOUT SEARCH ... EDUCATIONAL Niels Henrik David Bohr was born in Copenhagen on October 7, 1885, as the son of Christian Bohr, Professor of Physiology at Copenhagen University, and his wife Ellen, Adler. Niels, together with his younger brother Harald (the future Professor in Mathematics), grew up in an atmosphere most favourable to the development of his genius - his father was an eminent physiologist and was largely responsible for awakening his interest in physics while still at school, his mother came from a family distinguished in the field of education. After matriculation at the Gammelholm Grammar School in 1903, he entered Copenhagen University where he came under the guidance of Professor C. Christiansen, a profoundly original and highly endowed physicist, and took his Master's degree in Physics in 1909 and his Doctor's degree in 1911. While still a student, the announcement by the Academy of Sciences in Copenhagen of a prize to be awarded for the solution of a certain scientific problem, caused him to take up an experimental and theoretical investigation of the surface tension by means of oscillating fluid jets. This work, which he carried out in his father's laboratory and for which he received the prize offered (a gold medal), was published in the Transactions of the Royal Society, 1908. Bohr's subsequent studies, however, became more and more theoretical in character, his doctor's disputation being a purely theoretical piece of work on the explanation of the properties of the metals with the aid of the electron theory, which remains to this day a classic on the subject. It was in this work that Bohr was first confronted with the implications of Planck's quantum theory of radiation.

4. Niels Bohr - Biography Niels Bohr Biography Niels Henrik David Bohr was born in Copenhagen on October 7, 1885, as the son of Christian Bohr, Professor of http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

5. Physics 1922 Niels Bohr Biography Nobel Lecture Banquet Speech Swedish Nobel Stamps Other Resources 1921 1923. The 1922 Prize in Physics http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

6. Niels Bohr - Wikipédia Dossier interactif sur le physicien dans l'encyclop©die libre. http://fr.wikipedia.org/wiki/Niels_Bohr

Wikim©dia a besoin de votre aide notre page de collecte de fonds pour plus de d©tails. Niels Bohr Un article de Wikip©dia, l'encyclop©die libre. Articles de science physique quantique Th©orie quantique ‰lectrodynamique quantique M©canique quantique Th©orie des champs Mod¨le standard Statistique quantique Statistique de Bose-Einstein Statistique de Fermi-Dirac Statistique de Boltzmann Auteurs Bohr de Broglie Bose Einstein Fermi ... Feynman Exp©riences Formulaire Niels Bohr 7 octobre 18 novembre ) ©tait un physicien danois N©   Copenhague Danemark ) de Christian Bohr et Ellen Adler , Bohr obtint un doctorat   l'universit© de Copenhague en . Il fut dirig© par Ernest Rutherford Manchester Angleterre Se basant sur les th©ories de Rutherford, il publia en un mod¨le de la structure de l'atome . Cette th©orie pr©sente l' atome comme un noyau autour duquel gravitent des ©lectrons , les orbites les plus ©loign©es du noyau comprenant le plus d'©lectrons ce qui d©termine les propri©t©s chimiques de l'atome. Les ©lectrons ont la possibilit© de passer d'une couche   une autre, ©mettant un photon . Cette th©orie est   la base de la m©canique quantique En , Bohr devint professeur   l'Universit© de Copenhague puis en M©daille Hughes . En il re§ut le prix Nobel de physique pour son d©veloppement des m©caniques quantiques. Il fut ©galement laur©at de la

7. Niels Bohr History top Home Historical Notes Bohr, Niels Henrik David http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

8. Niels Bohr Institutet Forskning, Uddannelse Og Undervisning Niels Bohr Institutet. K BENHAVNS UNIVERSITET. Undervisning, forskning og formidling kosmologi, klima, kaos, kvanteoptik http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

9. Niels Bohr Archive website for the Niels Bohr Archive, Copenhagen http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

10. ESVA Bohr Mini-Exhibit "Every sentence I utter must be understood not as an affirmation but as a question." Niels Bohr http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

11. Center For History Of Physics - American Institute Of Physics About the Center. Programs. Niels Bohr Library. Publications. Contact us http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

12. A Science Odyssey People And Discoveries 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. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

13. Niels Bohr Physicist Lucidcaf 's Profile of Niels Bohr http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

14. Niels Henrik David Bohr Search Biographies. Bio search tips. Encyclopedia. Bohr, Niels Henrik David nels han' rek da've thstrok; bor Pronunciation Key http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

15. L'Encyclopédie De L'Agora: Niels Bohr Dossier sur le physicien danois dans l'encyclop©die de L'Agora. http://agora.qc.ca/mot.nsf/Dossiers/Niels_Bohr

Les professions La dernière édition du magazine L'Agora vient de paraître. Au sommaire: l'âme des professions, l'histoire des organisations professionnelles, professions et libéralisation des échanges, travail et culture de l'urgence, ainsi que les chroniques de nos collaborateurs habituels. Le Québec, ses ressources et ses réalisations : liens utiles, répertoires, listes informatisées, l'actualité. QuebecMonde.com Sciences et techniques Niels Bohr Portrait de Niels Bohr (année non précisée) Source : Library of Congress, Prints and Photographs Division Numéro de reproduction : LC-USZ62-87212 Discussions with Einstein on Epistemological Problems in Atomic Physics Reproduit de: Albert Einstein: Philosopher-Scientist , Cambridge University Press, 1949 Cherchez R accourcis intéressants Niels Bohr Institute (Copenhague, Danemark) Niels Bohr Archives Niels Bohr Library (Center for History of Physics, American Institute of Physics) Date de naissance Lieu de naissance Copenhague Date de décès Lieu de décès Copenhague Textes de Niels Bohr dans L'Encyclopédie Contradiction et vérité Sujet: Profondeur Extrait: Times CE>«Une vérité triviale, disait Niels Bohr, est une affirmation dont le contraire est faux. Une vérité profonde est une affirmation dont le contraire est aussi une vérité profonde».

16. Biographies Info Science : Bohr Niels Niels Bohr choisit-il tout http://www.infoscience.fr/histoire/biograph/biograph.php3?Ref=11

17. Niels Bohr: Definition And Much More From Answers.com Bohr ( bôr, bor ) , Niels Henrik David 1885–1962. Danish physicist. He won a 1922 Nobel Prize for investigating atomic structure and radiations. http://www.answers.com/topic/niels-bohr

showHide_TellMeAbout2('false'); Business Entertainment Games Health ... More... On this page: Dictionary Encyclopedia Science Medical WordNet Wikipedia Mentioned In Or search: - The Web - Images - News - Blogs - Shopping Niels Bohr Dictionary Bohr b´r, bōr Niels Henrik David Danish physicist. He won a 1922 Nobel Prize for investigating atomic structure and radiations. His son Aage Niels Bohr (born 1922), also a physicist, shared a 1975 Nobel Prize for discovering the asymmetry of atomic nuclei. Encyclopedia Bohr, Niels Henrik David nēls hăn rēk dā vē th bōr ) , 1885–1962, Danish physicist, one of the foremost scientists of modern physics. He studied at the Univ. of Copenhagen (Ph.D. 1911) and carried on research on the structure of the atom at Cambridge under Sir James J. Thomson and at Manchester under Lord Ernest Rutherford. In 1916, Bohr became professor of theoretical physics at the Univ. of Copenhagen, and in 1920 he was made director of the Institute of Theoretical Physics, which he was instrumental in founding. Rutherford had discovered the nucleus of the atom in 1911, but classical theory was unable to explain the stability of the nuclear model of the atom. Bohr provided the solution to this problem in 1913, when he postulated that electrons move around the nucleus of the atom in restricted orbits and explained the manner in which the atom absorbs and emits energy. He thus combined the

18. BOHR  Niels - ENGLISH bohr niels ENGLISH. Last updated 21.10.2004 090158. Niels Bohr was born in Copenhagen in Denmark in 1885. His father was a professor of physiology at http://nobelsoftware.com/vedci/bohren.htm

Last updated: 21.10.2004 09:01:58 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.

19. BOHR Niels Henrik David bohr niels Henrik David. Last updated 21.10.2004 090158 Niels Henrik David Bohr byl dánský fyzik, žijící v letech 1885 1962. http://nobelsoftware.com/vedci/bohr.htm

Last updated: 21.10.2004 09:01:58 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

20. BOHR  Niels - ENGLISH 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 at 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.

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