Niels Bohr 21210 225962610 2008-07-16T05:56:29Z Emerson7 191157 cleanup {{Disputed|date=March 2008}} {{Infobox Scientist | name = Niels Henrik David Bohr | image = Niels Bohr.jpg | imagesize = 180px | birth_date = {{birth date|1885|10|7|df=y}} | birth_place = [[Copenhagen]], [[Denmark]] | death_date = {{death date and age|1962|11|18|1885|10|7}} | death_place = [[Copenhagen]], [[Denmark]] | nationality = [[Denmark]] | field = [[Physics]] | alma_mater = [[University of Cambridge]]<br>[[University of Copenhagen]] | work_institutions = [[University of Copenhagen]]<br>[[University of Manchester]] | doctoral_advisor = [[Christian Christiansen]]<br>[[Ernest Rutherford]] | academic_advisors = | doctoral_students = [[Hendrik Anthony Kramers]] | notable_students = | known_for = [[Copenhagen interpretation]]<br>[[complementarity (physics)|Complementarity]]<br>[[Bohr model]]<br>[[Bohr effect]]<br>[[Sommerfeld-Bohr theory]]<br>[[BKS theory]]<br>[[Bohr-Einstein debates]] | influences = | influenced = [[Max Delbrück]]<br>[[Werner Heisenberg]]<br>[[Lise Meitner]] | awards = {{nowrap|[[Nobel Prize in Physics]] (1922) }} | footnotes = [[Harald Bohr]] is his younger brother, and [[Aage Bohr]] is his son. }} '''Niels Henrik David Bohr''' ({{pronounced|nels ˈb̥oɐ̯ˀ}} in Danish; [[October 7]], [[1885]] – [[November 18]], [[1962]]) was a [[Denmark|Danish]] [[physicist]] who made fundamental contributions to understanding [[atom]]ic structure and [[quantum mechanics]], for which he received the [[Nobel Prize]] in [[Physics]] in 1922. Bohr mentored and collaborated with many of the top physicists of the century at his institute in [[Copenhagen]]. He was also part of the team of physicists working on the [[Manhattan Project]]. Bohr married Margrethe Nørlund in 1912, and one of their sons, [[Aage Niels Bohr]], grew up to be an important physicist who, like his father, received the Nobel prize, in 1975. Bohr has been described as one of the most influential physicists of the 20th century.<ref>Murdoch, Dugald (2000) "Bohr" in Newton-Smith, N. H. (ed.) ''A Companion to the Philosophy of Science''. Great Britain: Blackwell Publishers, p. 26. ISBN 0-631-23020-3.</ref> ==Biography== ===Early life=== Niels Henrik David Bohr was born in [[Copenhagen]], [[Denmark]] in 1885. His father, [[Christian Bohr]], a devout [[Lutheranism|Lutheran]], was [[professor]] of [[physiology]] at the [[University of Copenhagen]] (it is his name which is given to the [[Bohr shift]]), while his mother, Ellen Adler Bohr, came from a wealthy [[Jewish]] family prominent in [[Denmark|Danish]] banking and parliamentary circles. His brother was [[Harald Bohr]], a [[mathematician]] and [[Olympic Games|Olympic]] [[football (soccer)|soccer]] player who played on the [[Denmark national football team|Danish national team]]. Niels Bohr was a passionate soccer player as well, and the two brothers played a number of matches for [[Akademisk Boldklub]]. Bohr studied as an undergraduate, graduate and, under [[Christian Christiansen]], as a doctoral student at [[Copenhagen University]], receiving his doctorate in 1911. As a post-doctoral student, Bohr first conducted experiments under [[J. J. Thomson]] at [[Trinity College, Cambridge]]. He then went on to study under [[Ernest Rutherford]] at the [[University of Manchester]] in [[England]]. On the basis of Rutherford's theories, Bohr published his [[Bohr model|model]] of [[atom|atomic structure]] in 1913, introducing the theory of [[electron]]s traveling in [[orbit]]s around the atom's [[atomic nucleus|nucleus]], the chemical properties of the element being largely determined by the number of electrons in the outer orbits. Bohr also introduced 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 a basis for [[Quantum mechanics|quantum theory]]. Niels Bohr and his wife Margrethe Nørlund had six children. Two died young, and most of the others went on to lead successful lives. One, [[Aage Niels Bohr]], also became a very successful physicist; like his father, he won a [[Nobel Prize]] in 1975. ===Physics=== In 1916, Niels Bohr became a [[professor]] at the [[University of Copenhagen]]. With the assistance of the Danish government and the Carlsberg Foundation, he succeeded in founding the Institute of Theoretical Physics in 1921, of which he became its director.<ref> {{cite web | url = http://www.nbi.ku.dk/english/about/history/ | title = History of the institute: The establishment of an institute | publisher = Niels Bohr Institute | author = Finn Aaserud | accessdate = 2008-05-11 }} </ref> In 1922, Bohr was awarded the [[Nobel Prize]] in [[physics]] "for his services in the investigation of the [[atom|structure of atoms]] and of the [[atomic radiation|radiation]] emanating from them." Bohr's institute served as a focal point for theoretical physicists in the 1920s and '30s, and most of the world's best known theoretical physicists of that period spent some time there. [[Image:Niels Bohr Date Unverified LOC.jpg|thumb]][[Image:Niels Bohr Albert Einstein by Ehrenfest.jpg|thumb|Niels Bohr and [[Albert Einstein]] debating quantum theory at [[Paul Ehrenfest]]'s home in Leiden (December 1925).]] Bohr also conceived the principle of [[Complementarity (physics)|complementarity]]: that items could be separately analyzed as having several contradictory properties. For example, physicists currently conclude that [[light]] is both a wave and a stream of particles — two apparently mutually exclusive properties — on the basis of this principle. Bohr also found [[philosophy|philosophical]] applications for this daringly original principle. [[Albert Einstein]] much preferred the determinism of classical physics over the probabilistic new physics of Bohr (to which [[Max Planck]] and Einstein himself had contributed). He and Bohr had good-natured arguments over the truth of this principle throughout their lives (see [[Bohr Einstein debate]]). One of Bohr's most famous students was [[Werner Heisenberg]], a crucial figure in the development of [[quantum mechanics]], who was also head of the German atomic bomb project. In 1941, during the [[Nazi Germany|German]] occupation of Denmark in [[World War II]], Bohr was visited by Heisenberg in Copenhagen (see section below). In 1943, shortly before he was to be arrested by the German police, Bohr [[Rescue of the Danish Jews|escaped to Sweden]], and then traveled to [[London]]. ===Atomic research=== He worked at the top-secret [[Los Alamos National Laboratory|Los Alamos]] laboratory in [[New Mexico]], [[United States|U.S.]], on the [[Manhattan Project]], where, according to [[Richard Feynman]], he was known by the assumed name of ''Nicholas Baker'' for security reasons. His role in the project was important. He was seen as a knowledgeable consultant or "father confessor" on the project. He was concerned about a nuclear arms race, and is quoted as saying, "That is why I went to America. They didn't need my help in making the atom bomb."<ref>{{cite web |url=http://www.doug-long.com/bohr.htm |title=Niels Bohr - The Atomic Bomb and beyond|accessdate=2006-12-21 |last=Long|first=Doug|work=Hiroshima - was it necessary?}}</ref> Bohr believed that atomic secrets should be shared by the international scientific community. After meeting with Bohr, [[J. Robert Oppenheimer]] suggested Bohr visit President [[Franklin D. Roosevelt]] to convince him that the [[Manhattan Project]] should be shared with the Russians in the hope of speeding up its results. Roosevelt suggested Bohr return to the United Kingdom to try to win British approval. [[Winston Churchill]] disagreed with the idea of openness towards the Russians to the point that he wrote in a letter: "It seems to me Bohr ought to be confined or at any rate made to see that he is very near the edge of mortal crimes."<ref>Richard Rhodes, The Making of the Atomic Bomb, (New York: Simon & Schuster, 1986.), pgs. 528-538.</ref> After the war Bohr returned to Copenhagen, advocating the peaceful use of [[nuclear energy]]. When awarded the [[Order of the Elephant]] by the Danish government, he designed his own [[coat of arms]] which featured a ''[[taijitu]]'' (symbol of yin and yang) and the Latin motto '' contraria sunt complementa'': opposites are complementary.<ref>{{cite web | last = | first = | authorlink = | coauthors = | title = Bohr crest | work = | publisher = University of Copenhagen | date = [[1947-10-17]] | url = http://www.nbi.dk/hehi/logo/bohr_crest.png | format = | doi = | accessdate = 2007-03-16}}</ref> He died in [[Copenhagen]] in 1962. He is buried in the [[Assistens Cemetery|Assistens Kirkegård]] in the [[Nørrebro]] section of Copenhagen. ==Contributions to physics== *[[Bohr model|Bohr's model]] *The theory that [[electron]]s travel in discrete [[orbit]]s around the atom's [[atomic nucleus|nucleus]], with the chemical properties of an element being largely determined by the number of electrons in its outer orbit. *The idea that an electron could in fact drop from a higher-energy orbit to a lower one, emitting a [[photon]] (light [[quantum]]) of discrete energy (this became the basis for the [[Quantum mechanics|quantum theory]]). *Identified the isotope of uranium that was responsible for slow-neutron fission - U<sup>235</sup><ref>Richard Rhodes, ''The Making of the Atomic Bomb'',(1986) Simon&Shuster, NY,NY, pp.282-88</ref>. *Much work on the [[Copenhagen interpretation]] of [[quantum mechanics]]. *The principle of [[complementarity (physics)|complementarity]]: that items could be separately analyzed as having several contradictory properties. ==Kierkegaard's influence on Bohr== It is generally accepted that Bohr read the 19th century Danish [[philosopher]] [[Søren Kierkegaard]]. [[Richard Rhodes]] argues in ''[[The Making of the Atomic Bomb#Nuclear history|The Making of the Atomic Bomb]]'' that Bohr was influenced by Kierkegaard via the philosopher [[Harald Høffding]], who was strongly influenced by Kierkegaard and who was an old friend of Bohr's father. In 1909, Bohr sent his brother Kierkegaard's ''[[Stages on Life's Way]]'' as a birthday gift. In the enclosed letter, Bohr wrote, "It is the only thing I have to send home; but I do not believe that it would be very easy to find anything better.... I even think it is one of the most delightful things I have ever read." Bohr enjoyed Kierkegaard's language and literary style, but mentioned that he had some "disagreement with [Kierkegaard's ideas]."<ref>{{cite web|url=http://enlightenment.supersaturated.com/essays/text/bryanregister/bohr_compliementarity.html|title=Complementarity: Content, Context and Critique|accessdate=2006-12-21|last=Register|first=Bryan|date=1997-12-01}}</ref> Given this, there has been some dispute over whether Kierkegaard influenced Bohr's philosophy and science. David Favrholdt<ref>Favrholdt, David. ''Niels Bohr’s Philosophical Background''. Copenhagen: Munksgaard (1992): pp. 42-63.</ref> argues that Kierkegaard had minimal influence over Bohr's work; taking Bohr's statement about disagreeing with Kierkegaard at face value, while Jan Faye<ref>Faye, Jan. "Niels Bohr: His Heritage and Legacy." Dordrecht: Kluwer Academic Publishers (1991).</ref> endorses the opposing point of view by arguing that one can disagree with the content of a theory while accepting its general premises and structure.<ref>Mark Richardson, et al. Religion & Science: History, Method, Dialogue. Routledge 1996, pg.289</ref> ==Relationship with Heisenberg== Bohr and [[Werner Heisenberg]] enjoyed a strong mentor/protégé relationship up to the onset of World War II. Heisenberg had made Bohr aware of his talent during a lecture in 1922 in Göttingen. During the mid-1920s Heisenberg worked with Bohr at the institute in Copenhagen. Heisenberg, as most of Bohr's assistants, learned Danish. Heisenberg's [[uncertainty principle]] was developed during this period. Bohr's complementarity principle likewise. By the time of World War II, the relationship became strained because, among other reasons Bohr, with his partially-Jewish heritage, remained in occupied Denmark, while Heisenberg remained in Germany and became head of the German nuclear efforts. Heisenberg made a now-famous visit to Bohr in September/October 1941, and during a private moment, it seems that he began to address nuclear energy and morality as well as the war effort. Neither Bohr nor Heisenberg spoke about it in any detail to outsiders nor left written records of this part of the meeting at the time, and they were alone and outside.<ref>{{cite book | last = Heisenberg | first = Elisabeth | authorlink = | coauthors = | title = Inner Exile: Recollections of a Life With Werner Heisenberg | publisher = Birkhauser | date = 1984 | location = Boston MA | pages = p77 et seq | url = | doi = | id = | isbn =0817631461 }}</ref> Bohr seems to have reacted by terminating that conversation abruptly while not giving Heisenberg any hints in any direction. While some suggest that the relationship became strained at this meeting, other evidence shows that the level of contact had been reduced considerably for some time already. One source, Heisenberg himself, suggests that the fracture occurred later. In correspondence to his wife, Heisenberg described the final visit of the trip: "Today I was once more, with Weizsaecker, at Bohr's. In many ways this was especially nice, the conversation revolved for a large part of the evening around purely human concerns, Bohr was reading aloud, I played a Mozart Sonata (A-Major)."<ref>{{cite web |url=http://werner-heisenberg.unh.edu/copenhagen.htm|title=Letter from Werner Heisenberg to his wife Elisabeth written during his 1941 visit in Copenhagen|accessdate=2006-12-21|last=Heisenberg|first=Werner|authorlink=Werner Heisenberg|publisher=Heisenberg, Jochen}}</ref> [[Ivan Supek]], one of Heisenberg's students and friends, claimed that the main figure of the meeting was actually [[Carl Friedrich von Weizsäcker|Weizsäcker]] who tried to persuade Bohr to mediate for peace between Great Britain and Germany.<ref>{{cite web |url=http://jutarnji.hr/clanak/art-2006,3,19,supek_intervju,17440.jl?artpg=1|title=A March 2006 interview with Ivan Supek relating to 1941 Bohr - Heisenberg meeting (Croatian)|accessdate=2007-08-13|last=[[Jutarnji list]]|publisher=Jutarnji list}}</ref> === Tube Alloys === "[[Tube Alloys]]" was the code-name for the British nuclear weapon program. The British intelligence services inquired about Bohr's availability for work or insights of particular value. Bohr's reply made it clear that he could not help. This reply, like his reaction to Heisenberg, made sure that, if Gestapo intercepted anything attributed to Bohr it would simply point to no particularly relevant knowledge regarding nuclear energy, as it stood in 1941. This does not exclude the possibility that Bohr privately did make calculations going further than his work in 1939 with Wheeler. After leaving Denmark in the dramatic day and night (October 1943) when most Jews were able to escape to Sweden due to a series of very exceptional circumstances (see [[Rescue of the Danish Jews]]), Bohr was quickly asked, again, to join British efforts, and he was flown to the UK for that purpose. He was evacuated from Stockholm in 1943 in an unarmed [[De Havilland Mosquito]] bomber (carried in an improvised cabin in the bomb bay) sent by the RAF. The flight almost ended in tragedy as Bohr did not don his oxygen equipment as instructed, and passed out. He would have died had not the pilot, surmising from Bohr's lack of response to intercom communication that he had lost consciousness, descended to a lower altitude for the remainder of the flight. Bohr's comment was that he had slept like a baby for the entire flight. As part of the UK team on "Tube Alloys" Bohr was also included at [[Los Alamos National Laboratory|Los Alamos]]. [[Robert Oppenheimer|Oppenheimer]] credited Bohr warmly for his guiding help during certain discussions among scientists there. Discreetly, he met President [[Franklin D. Roosevelt]] and later [[Winston Churchill]] to warn against the perilous perspectives that would follow from separate development of nuclear weapons by several powers rather than some form of controlled sharing of the basic scientific knowledge, which would spread quickly in any case. Only in the 1950s, after the immense surprise that the Soviets could and did in fact develop the weapons independently, was it possible to create the [[International Atomic Energy Agency]] along the lines of Bohr's old suggestion. === Speculation === In 1957, while the author [[Robert Jungk]] was working on the book ''Brighter Than a Thousand Suns'', Heisenberg wrote to Jungk explaining that he had visited Copenhagen to communicate to Bohr his view that scientists on either side should help prevent development of the [[atomic bomb]], that [[German nuclear energy project|the German attempts]] were entirely focused on energy production, and that Heisenberg's circle of colleagues tried to keep it that way.<ref>{{cite web|url=http://www.childrenofthemanhattanproject.org/MP_Misc/Bohr_Heisenberg/bohr_2.htm|title=Letter From Werner Heisenberg to Author Robert Jungk|accessdate=2006-12-21|last=Heisenberg|first=Werner|authorlink=Werner Heisenberg|publisher=The Manhattan Project Heritage Preservation Association, Inc.}}</ref> However, Heisenberg acknowledged that his cryptic approach of the subject had so alarmed Bohr that the discussion failed. Heisenberg nuanced his claims, though, and avoided the implication that he and his colleagues had purposely sabotaged the bomb effort. However, this nuance was lost in Jungk's original publication of the book, which strongly implied that the German atomic bomb project was rendered purposely stillborn by Heisenberg. When Bohr saw Jungk's erroneous depiction in the Danish translation of the book, he disagreed wholeheartedly. He drafted (but never sent) a letter to Heisenberg, stating that while Heisenberg had indeed discussed the subject of nuclear weapons in Copenhagen, Heisenberg had never alluded to the fact that he might be resisting efforts to build such weapons. Bohr dismissed the idea of any pact as an after-the-fact construction.<ref>{{cite web|url=http://www.nba.nbi.dk/release.html |title=Release of documents relating to 1941 Bohr-Heisenberg meeting |accessdate=2007-06-04|last=Aaserud|first=Finn|date=2002-02-06|publisher=Niels Bohr Archive}}</ref> [[Michael Frayn]]'s play ''[[Copenhagen (play)|Copenhagen]]'', which was performed in London (for five years), Copenhagen, Gothenburg, Rome, Athens (Greece), Geneva and on [[Broadway theatre|Broadway]] in New York, explores what might have happened at the 1941 meeting between Heisenberg and Bohr. Frayn points in particular to the onus of being one of the few, or the first one, to understand what it would mean in practice to create a nuclear weapon. ==Legacy== ===Commemorations=== *In 1965, three years after Bohr's death, the [[Niels Bohr Institute for Astronomy, Physics and Geophysics|Institute of Physics]] at the [[University of Copenhagen]] changed its name to the [[Niels Bohr Institute]]. * The [[Bohr model]]s semicentennial was commemorated in Denmark on [[November 21]] [[1963]] with a [[Commemorative stamps|postage stamp]] depicting [[List of people on stamps of Denmark#B|Bohr]], the [[hydrogen]] atom and the [[formula]] for the difference of any two hydrogen energy levels: <math>h\nu = \epsilon_{2} - \epsilon_{1}\,</math>. * [[Bohrium]] (a chemical element, atomic number 107) is named in honour of Niels Bohr. * [[Hafnium]], another chemical element, whose properties were predicted by Niels Bohr, was named by him after Hafnia, [[Copenhagen]]'s Latin name. * [[3948 Bohr|Asteroid 3948 Bohr]] is named after him. * The Centennial of Bohr's birth was commemorated in Denmark on October 3 1985 with a postage stamp depicting Bohr with his wife Margrethe. * In 1997 the [[Danish National Bank]] started circulating the [[danish five-hundred-kroner bill]] with the portrait of Niels Bohr smoking a pipe.<ref name="ISBN 8787251558">{{cite web|url=http://www.nationalbanken.dk/C1256BE900406EF3/sysOakFil/Danmarks_penge_2005_ENG/$File/Coins_Banknotes.pdf|title=The coins and banknotes of Denmark|date=2005|publisher=National Bank of Denmark|pages=p20|accessdate=2008-05-03}}</ref> ===Quotations=== {{Copy section to Wikiquote|date=June 2008}} {{wikiquote}} *''"If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet."'' *''"Nothing exists until it is measured."'' *''"A triviality is a statement whose opposite is false. However, a great truth is a statement whose opposite may well be another great truth."'' *''"Your theory is crazy, but it's not crazy enough to be true."'' *''"How wonderful that we have met with a paradox. Now we have some hope of making progress!"'' *''"Einstein, stop telling God what to do."'' Sometimes quoted including: ''"...with his dice."'' *Alternate version: ''"Don't you think caution is needed when using ordinary language to ascribe attributes to God?"'' *''"The complement of truth is clearness."'' *''"It is very difficult to make an accurate prediction, especially about the future."'' (Also attributed to Danish cartoonist Robert Storm Petersen, a.k.a. [[Storm P.]]) *''"An expert is a person who has made all the mistakes that can be made in a very narrow field."'' *''"Never talk faster than you think."'' *''"There are some things so serious you have to laugh at them." *''"It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we can say about nature." == Further reading == ===Primary=== *Bohr, N. (1913). [http://dbhs.wvusd.k12.ca.us/webdocs/Chem-History/Bohr/Bohr-1913a.html On the Constitution of Atoms and Molecules], ''Philosophical Magazine'', Series 6, Vol. 26. pg. 1-25. *Bohr, N., ''Causality and Complementarity: Epistemological Lessons of Studies in Atomic Physics'', 1999 Ox Bow Press: ISBN 1-881987-13-2, the 1949–50 [[Gifford lectures]] *Bohr, N., ''Atomic Physics and Human Knowledge'' (1958), Wiley Interscience, 1987 Ox Bow Press: ISBN 0-91802452-8, seven essays written from 1933 to 1957 ===Secondary=== * ''Niels Bohr Collected Works 13-Volume Limited Edition Set'', General Editor, Finn Aaserud; ISBN 978-0-444-53286-2 * ''Niels Bohr: The Man, His Science, and the World They Changed'', by Ruth Moore; ISBN 0-262-63101-6 * ''Niels Bohr's Times, In Physics, Philosophy and Polity'', by [[Abraham Pais]]; ISBN 0-19-852049-2 * ''Niels Bohr: His Life and Work As Seen by His Friends and Colleagues'', edited by [[Stefan Rozental]], John Wiley & Sons, 1964. * ''Suspended In Language: Niels Bohr's Life, Discoveries, And The Century He Shaped'' by Jim Ottaviani (graphic novel); ISBN 0-9660106-5-5 * ''Harmony and Unity : The Life of Niel's Bohr'', by Niels Blaedel; ISBN 0-910239-14-2 * ''Niels Bohr: A Centenary Volume,'' edited by A. P French and P.J. Kennedy. ISBN 0-674-62415-7 *''[[Copenhagen (play)|Copenhagen]]'' [[Michael Frayn]] ISBN 0 413 72490 5 * ''Faust in Copenhagen: A Struggle for the Soul of Physics'' by Gino Segre; ISBN 0-670-03858-X ==See also== * [[Quantum mechanics]] * [[Bohr model]] * [[Bohr-Sommerfeld quantization]] * [[Copenhagen interpretation]] of quantum mechanics * [[Stefan Rozental]] (research assistant to Bohr in Copenhagen) ==References== {{reflist|2}} ==External links== {{commons|Niels Henrik David Bohr}} * [http://elsevierdirect.com/nielsbohr Niels Bohr Collected Works.] * [http://www-personal.umich.edu/~jbourj/money1.htm Niels Bohr on the 500 Danish Kroner banknote.] * [http://www.britannica.com/eb/article-9106088/Niels-Bohr Encyclopaedia Britannica article on Niels Bohr] * [http://www.nba.nbi.dk/ Niels Bohr Archive] * [http://www.nobel.se/physics/laureates/1922/ Nobel Foundation: Niels Bohr] * [http://alsos.wlu.edu/qsearch.aspx?browse=people/Bohr,+Niels Annotated bibliography for Niels Bohr from the Alsos Digital Library for Nuclear Issues] * Quantum Chemistry I Lecture - [http://cinarz.zdo.com/moodle/mod/resource/view.php?id=15 Bohr's Model of the Atom] * [http://www.aip.org/history/heisenberg/bohr-heisenberg-meeting.htm The Bohr-Heisenberg meeting in September 1941] * [http://www.archiv.uni-leipzig.de/heisenberg/Vom_Frieden_zum__Krieg/vom_frieden_zum__krieg.htm Werner Heisenberg Ausstellung: Vom Frieden zum Krieg: Kernphysik und Kernenergie] * [http://www.aip.org/history/ohilist/4517_1.html Oral History interview transcript with Niels Bohr 31 October 1962, American Institute of Physics, Niels Bohr Library and Archives] * [http://www.science.tv/watch/3bcea3b7513ccef5857a/THE-CORE Short video documentary about Niels Bohr] {{Nobel Prize in Physics Laureates 1901-1925}} {{BD|1885|1962|Bohr, Niels}} {{Persondata |NAME=Bohr, Niels Henrik David |ALTERNATIVE NAMES=Bohr, Niels |SHORT DESCRIPTION=Danish physicist |DATE OF BIRTH=[[October 7]], [[1885]] |PLACE OF BIRTH=[[Copenhagen]], [[Denmark]] |DATE OF DEATH=[[November 18]], [[1962]] |PLACE OF DEATH=[[Copenhagen]], [[Denmark]] }} [[Category:Academics of the Victoria University of Manchester]] [[Category:Akademisk Boldklub players]] [[Category:Alumni of Trinity College, Cambridge]] [[Category:Danish footballers]] [[Category:Danish Jews]] [[Category:Danish Lutherans]] [[Category:Danish physicists]] [[Category:Fellows of the Leopoldina]] [[Category:Knights of the Elephant]] [[Category:Manhattan Project people]] [[Category:Members of the Pontifical Academy of Sciences]] [[Category:Members of the Prussian Academy of Sciences]] [[Category:Nobel laureates in Physics]] [[Category:People from Copenhagen]] [[Category:Quantum physicists]] [[Category:Recipients of the Copley Medal]] [[Category:Recipients of the Pour le Mérite (civil class)]] [[Category:Theoretical physicists]] [[Category:University of Copenhagen alumni]] {{Link FA|ka}} [[af:Niels Bohr]] [[ar:نيلز بور]] [[az:Nils Bor]] [[bn:নিল্‌স বোর]] [[zh-min-nan:Niels Bohr]] [[be:Нільс Бор]] [[be-x-old:Нільс Бор]] [[bs:Niels Bohr]] [[br:Niels Bohr]] [[bg:Нилс Бор]] [[ca:Niels Bohr]] [[cs:Niels Bohr]] [[cy:Niels Bohr]] [[da:Niels Bohr]] [[de:Niels Bohr]] [[et:Niels Bohr]] [[el:Νιλς Μπορ]] [[es:Niels Bohr]] [[eo:Niels Bohr]] [[eu:Niels Bohr]] [[fa:نیلز بور]] [[fr:Niels Bohr]] [[ga:Niels Bohr]] [[gl:Niels Bohr]] [[ko:닐스 보어]] [[hi:नील्स बोह्र]] [[hr:Niels Bohr]] [[io:Niels Bohr]] [[id:Niels Bohr]] [[is:Niels Bohr]] [[it:Niels Bohr]] [[he:נילס בוהר]] [[jv:Niels Bohr]] [[ka:ნილს ბორი]] [[sw:Niels Bohr]] [[ku:Niels Bohr]] [[la:Nicolaus Bohr]] [[lv:Nīlss Bors]] [[lt:Niels Bohr]] [[lmo:Niels Bohr]] [[hu:Niels Bohr]] [[mk:Нилс Бор]] [[mr:नील्स बोर]] [[ms:Niels Bohr]] [[nl:Niels Bohr]] [[ja:ニールス・ボーア]] [[no:Niels Bohr]] [[nn:Niels Bohr]] [[oc:Niels Bohr]] [[pms:Niels Bohr]] [[pl:Niels Bohr]] [[pt:Niels Bohr]] [[ro:Niels Bohr]] [[ru:Бор, Нильс Хенрик Давид]] [[sa:नील्स बोह्र]] [[sco:Niels Bohr]] [[sq:Niels Bohr]] [[simple:Niels Bohr]] [[sk:Niels Henrick David Bohr]] [[sl:Niels Henrik David Bohr]] [[sr:Нилс Бор]] [[sh:Niels Bohr]] [[fi:Niels Bohr]] [[sv:Niels Bohr]] [[tl:Niels Bohr]] [[kab:Niels Bohr]] [[th:นีลส์ บอร์]] [[vi:Niels Bohr]] [[tr:Niels Bohr]] [[uk:Бор Нільс]] [[ur:بورنیلز]] [[yi:ניעלס באהר]] [[zh-yue:玻爾]] [[zh:尼尔斯·玻尔]]