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	Niels Bohr - Wikipedia, the free encyclopedia
		His father, Christian Bohr, was a professor of physiology at the University of Copenhagen, while his mother, Ellen Adler Bohr, came from a wealthy Sephardic Jewish family prominent in Danish banking and parliamentary circles.
		Based on Rutherford's theories, Bohr published his model of atomic structure in 1913, introducing the theory of electrons traveling in orbits around the atom's nucleus, the chemical properties of the element being largely determined by the number of electrons in the outer orbits.
		In 1916, Niels Bohr became a professor at the University of Copenhagen, and director of the newly constructed "Institute of Theoretical Physics" in 1920.
	en.wikipedia.org /wiki/Niels_Bohr (1077 words)

	Bohr_Niels (Site not responding. Last check: 2007-10-08)
		Bohr was taught mathematics at university by Thorvald Thiele.
		Bohr applied to the Carlsberg Foundation for a travel grant in May 1911 and, after the award was made, went to England in September 1911 to study with Sir J J Thomson at Cambridge.
		Bohr's other major contributions, in addition to quantum theory, include his theoretical description of the periodic table of elements around 1920, his theory of the atomic nucleus being a compound structure in 1936, and his understanding of uranium fission in terms of the isotope 235 in 1939.
	www-groups.dcs.st-and.ac.uk /~history/Mathematicians/Bohr_Niels.html (2841 words)

	Copenhagen . Niels Bohr \| PBS
		Bohr postulated that radiation is emitted from atoms not as a result of the periodic motion of the electron in its orbit, but only when an electron "jumps" from one orbit to another losing energy that is emitted as radiation.
		Bohr's theory of the compound nucleus, in which the repulsion between positively charged protons is countered by huge amounts of energy in order to hold the nucleus together, helped lead to the hypothesis that splitting an atom would produce enough energy to fabricate a powerful weapon.
		Niels Bohr died in 1962 and is buried in Copenhagen.
	www.pbs.org /hollywoodpresents/copenhagen/story/bohr.html (558 words)

	MSN Encarta - Niels Bohr
		Bohr was born in Copenhagen, the son of a physiology professor, and was educated at the University of Copenhagen, where he earned his doctorate in 1911.
		Bohr’s theory of atomic structure (see Quantum Theory), for which he received the Nobel Prize in physics in 1922, was published in papers between 1913 and 1915.
		In 1916 Bohr returned 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.
	encarta.msn.com /encyclopedia_761576813/Niels_Bohr.html (538 words)

	Bohr, Niels Henrik David. The Columbia Encyclopedia, Sixth Edition. 2001-05
		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.
		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.
		Bohr was a leading figure in the continuing development of the quantum theory over the next twenty years.
	www.bartleby.com /65/bo/Bohr-Nie.html (424 words)

	Bohr model - Wikipedia, the free encyclopedia
		Because of its simplicity, the Bohr model is still commonly taught to introduce students to quantum mechanics.
		The Bohr model is actually only accurate for one-electron systems such as the hydrogen atom or singly-ionized helium.
		Bohr did not make this assumption (known as the de Broglie hypothesis) in his original derivation, because it hadn't been proposed at the time.
	en.wikipedia.org /wiki/Bohr_model (928 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		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.
		Especially astonishing was that Bohr, in his explanation of atomic structure, departed from classical mechanics and made use of Planck's constant and the quantum theory.
		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.
	www.phy.hr /~dpaar/fizicari/xbohr.html (528 words)

	Bohr, Niels
		Bohr was born in Copenhagen on Oct. 7, 1885.
		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.
		Bohr was among the first to see the importance of the atomic number, which indicates the position of an element in the periodic table and is equal to the number of natural units of electric charge on the nuclei of its atoms.
	www.britannica.com /nobel/macro/5000_79.html (2274 words)

	Niels Bohr (Site not responding. Last check: 2007-10-08)
		Bohr was considered to be one of the most prominent physicists of his time.
		Niels Bohr theorized and was able to prove that the internal structure of a nucleus is a complex, compound structure inside an atom.
		Bohr was the first person to show that the isotope, uranium-235 can go through fission by way of neutron creation and not the normal atom, uranium-238.
	www.usd.edu /phys/courses/phys300/gallery/clark/bohr.html (689 words)

	Niels Bohr - Biography
		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.
		In 1913-1914 Bohr held a Lectureship in Physics at Copenhagen University and in 1914-1916 a similar appointment at the Victoria University in Manchester.
		Bohr's activities in his Institute were since 1930 more and more directed to research on the constitution of the atomic nuclei, and of their transmutations and disintegrations.
	nobelprize.org /physics/laureates/1922/bohr-bio.html (1164 words)

	Niels Bohr Homepage
		Bohr knew that the electrons should, theoretically, lose energy and spiral toward the nucleus until they collide with it.
		Bohr’s model of the atom proved essentially correct, and he won the Nobel Prize for his quantum theory studies in 1922.
		Bohr came up with “complementarity.” This is also called wave-particle duality, which states that certain waves, like light, exhibit characteristics of waves and particles.
	www.angelfire.com /scifi/concordiasci/bohr.html (780 words)

	Niels Henrik David Bohr
		Bohr is best known for the investigations of atomic structure referred to above and also for work on radiation, which won him the 1922 Nobel Prize for physics.
		Bohr thought that his idea of complementarity could play an important role in fields other than quantum physics and he worked on these ideas throughout the ret of his life.
		Bohr, although he had been christened in the Christian Church, had Jewish origins on his mother's side and so, when the Nazis occupied Denmark in 1940, his life became exceeding difficult.
	www.jewishvirtuallibrary.org /jsource/biography/Bohr.html (2671 words)

	Niels Bohr \| Physicist
		Bohr also described the way atoms emit radiation by suggesting that when an electron jumps from an outer orbit to an inner one, that it emits light.
		Bohr became a professor of physics at the University of Copenhagen in 1916.
		Bohr became a Fellow of the Royal Society of London in 1926, receiving the Royal Society Copley Medal in 1938.
	www2.lucidcafe.com /lucidcafe/library/95oct/nbohr.html (662 words)

	SJSU Virtual Museum (Site not responding. Last check: 2007-10-08)
		Niels Bohr was awarded a Nobel Prize for physics in 1922 for his work on determining the structure of the atom.
		Bohr's work combined the quantum theory with the Planck constant (the ratio between quantum size and the frequency of radiation from the atom).
		In 1916 Bohr returned to Holland and accepted a position as a professor of physics at the University of Copenhagen.
	www.sjsu.edu /depts/Museum/boh.html (258 words)

	Copenhagen Interpretation of Quantum Mechanics
		Bohr therefore believed that what gives us the possibility of talking about an object and an objectively existing reality is the application of those necessary concepts, and that the physical equivalents of “space,” “time,” “causation,” and “continuity” were the concepts “position,” “time,” “momentum,” and “energy,” which he referred to as the classical concepts.
		In general, Bohr considered the demands of complementarity in quantum mechanics to be logically on a par with the requirements of relativity in the theory of relativity.
		Bohr believed that atoms are real, but it remains a much debated point in the recent literature what sort of reality he believed them to have, whether or not they are something beyond and different from what they are observed to be (Folse 1985 and 1994; and Faye 1991).
	plato.stanford.edu /entries/qm-copenhagen (4423 words)

	Bohr model of the atom (Site not responding. Last check: 2007-10-08)
		Rutherford, who had a few years earlier, discovered the planetary model of the atom asked Bohr to work on it because there were some problems with the model: According to the physics of the time, Rutherford's planetary atom should have an extremely short lifetime.
		With these conditions Bohr was able to explain the stability of atoms as well as the emission spectrum of hydrogen.
		Bohr's model was so successful that he immediately received world-wide fame.
	www.iun.edu /~cpanhd/C101webnotes/modern-atomic-theory/Bohr-model.html (269 words)

	The Bohr Atom
		Bohr concluded that in an atom in its natural rest state, the electron must be in a special orbit, he called it a "stationary state" to which the usual rules of electromagnetic radiation didn't apply.
		Bohr suggested in a note to Rutherford in the summer of 1912 that requiring this energy be some constant (assumed to be of order of magnitude one) multiplied by hf would fix the size of the atom.
		Therefore, Bohr concluded K is fixed by requiring that the frequency of radiation emitted by a really large atom be correctly given by ordinary common sense -- that is, the frequency of the radiation must be the same as the orbital frequency of the electron, the number of cycles a second.
	galileo.phys.virginia.edu /classes/252/Bohr_Atom/Bohr_Atom.html (2892 words)

	A Science Odyssey: People and Discoveries: Niels Bohr
		Niels Bohr was born and educated in Copenhagen, Denmark.
		Bohr remained director of the institute for the rest of his life, except for his absence during World War II.
		Bohr's personal warmth, good humor ("Never express yourself more clearly than you can think," he once said), and hospitality combined with world events to make Copenhagen a refuge for many of the century's greatest physicists.
	www.pbs.org /wgbh/aso/databank/entries/bpbohr.html (705 words)

	Niels Bohr \| Biography \| atomicarchive.com
		Niels Henrik David Bohr was born in Copenhagen in 1885 to Christian Bohr, a professor of physiology at the University of Copenhagen and a Nobel Prize winner, and Ellen Adler Bohr, who came from a wealthy Sephardic Jewish family prominent in Danish banking and parliamentary circles.
		Bohr received his doctorate from Copenhagen University in 1911 and then studied under Ernest Rutherford in the Victoria University in Manchester, England.
		After 1930, Bohr's activities in his Institute were focused on research on the constitution of the atomic nuclei and of their transmutations and disintegrations.
	www.atomicarchive.com /Bios/Bohr.shtml (456 words)

	Bohr, Niels (Henrik David) (Site not responding. Last check: 2007-10-08)
		Bohr's first model of the atom was developed working with Ernest Rutherford at Manchester, UK.
		Bohr developed models of the atom in which electrons are disposed in rings around the nucleus, a first step towards an explanation of atomic structure.
		Bohr's atomic theory was validated 1922 by the discovery of an element he had predicted, which was given the name hafnium.
	cartage.org.lb /en/themes/biographies/mainbiographies/b/bohrn/1.html (349 words)

	Niels Bohr: The Atomic Bomb and Beyond
		But Bohr was also one of the most foresighted of men, and one of the few who not only thought ahead about the post-World War II implications of the atomic bomb but who personally urged President Franklin Roosevelt and Prime Minister Winston Churchill to prepare for the nuclear future.
		Bohr became one of the key fission researchers, determining in 1939 that the rare U-235 isotope was the isotope that made uranium fissionable and which made a chain reaction theoretically possible.
		Bohr was surprised; he later wrote: "...it was a revelation to me to learn...about the advanced stage the work had already reached" (J. Robert Oppenheimer papers, Box 34, Bohr memorandum to President Roosevelt, July 3rd, 1944, Library of Congress).
	www.doug-long.com /bohr.htm (1791 words)

	NBI Today and previously.
		The main subjects of research at the Niels Bohr Institute are: Experimental and theoretical high-energy and nuclear physics, astrophysics, chaos and turbulence, biophysics, quantum optics...
		Bohr's lectures, composed with tremendous labour, were indeed masterpieces of allusive evocation of a subtle dialectic; the trouble was that the audience was usually unprepared to catch subtle allusions to conceptions and arguments which were anyhow unfamiliar and hard to grasp.
		Bohr intervened with a soothing pronouncement about how hard it was to imagine how the behaviour of the electron could be described beyond the limit where correspondence with the classical point-charge picture afforded legitimate guidance; we must here be prepared for further renouncement in the application of classical concepts.
	www.nbi.dk /nbi-history.html (6277 words)

	Nuclear Files: Library: Biographies: Niels Bohr
		Bohr expanded on Rutherford's theory, suggesting that electrons only travel in successively larger orbits and that the outer orbits hold more electrons than the inner ones.
		In 1922, Bohr won the Nobel Prize in Physics for his work on the structure of atoms.
		In 1916, Bohr became a professor of physics at the University of Copenhagen and in 1920 was named the Director of the "Institute of Theoretical Physics" at the university.
	www.nuclearfiles.org /menu/library/biographies/bio_bohr-niels.htm (279 words)

	Niels Bohr
		In one of Bohr's successful attempts at this, he was especially pleased to note that Einstein had forgotten that according to his own theory of general relativity clocks run more slowly under the influence of a gravitational field.
		Bohr said that many non-radiating orbits were allowed, each one having an integral factor of the basic unit of angular momentum, h/2*pi.
		Bohr's "Copenhagen school" produced the famous "Copenhagen interpretation" of quantum mechanics of which one of the main planks was Bohr's theory of "complementarity".
	www.sunderland.ac.uk /~hs0bcl/h_nb.htm (723 words)

	Bohr_Harald (Site not responding. Last check: 2007-10-08)
		Harald Bohr was a younger brother of Niels Bohr.
		Harald and Niels Bohr's mother, Ellen Adler Bohr, came from a wealthy Jewish family with family members who were important in banking and in politics in Denmark.
		Bohr's interest in which functions could be represented by a Dirichlet series led him to devise the theory of almost periodic functions.
	www-groups.dcs.st-and.ac.uk /~history/Mathematicians/Bohr_Harald.html (727 words)

	Daily Celebrations ~ Niels Bohr, A Profound Truth ~ October 7 ~ Ideas to motivate, educate, and inspire
		One of the leading figures of modern science, Danish physicist Niels Henrik David Bohr (1885-1962) was born on this day, studied at Copenhagen University, and was a professor there.
		In 1912, Bohr moved to England and worked with the Nobel Prize-winning scientist Ernest Rutherford to better understand the structure of the atom.
		Bohr won the 1922 Nobel Prize in Physics for his theory of atom structure and was involved in the research at Los Alamos, New Mexico in 1945.
	www.dailycelebrations.com /100700.htm (281 words)

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