Niels Henrik David Bohr (October 7, 1885 – November 18, 1962) was a Danish physicist who made essential contributions to understanding atomic structure and quantum mechanics.

Bohr's contributions to physics
Bohr's model of atomic structure. The negatron's orbital angular macd is quantal; L=nħ. The theory that electrons travel in distinct orbits around a atom's nucleus, with a chemical substance properties of the element existence largely determined per total of negatron in the outer orbits. The idethe that an negatron may drop from either the higher-energy orbit to the moo 1, emitting a photon (light quantum) of discrete energy (this became a basis for quantum theory). The Copenhagen interpretation of quantum mechanics. The principle of complementarity: that items can be on an individual basis analyzed when with many contradictory properties. He received a Nobel Prize for Physical science for this operate around 1922.

Biography
Early years

Bohr was innate within Copenhagen in 1885. His father, Christian Bohr, was a prof of physiology at a University of Copenhagen, when his mother, Ellen Adler Bohr, came from either the moneyed Sephardic Jewish family large inside Danish banking & parliamentary circles. His brother was Harald Bohr, a mathematician and Olympic soccer player.

Bohr received his doctor's degree from either Copenhagen University in 1911. He so exposed under Ernest Rutherford in the Victoria University of Manchester in England. According to Rutherford's theories, Bohr published his model of atomic structure around 1913, introducing the theory of electrons traveling in orbits around a atom's nucleus, the chemical properties of the element existence largely determined per total of negatron in the outer orbits. Bohr besides introduced the idethe that an negatron may drop from either the higher-energy orbit to a moo a single, emitting a photon (light quantum) of discrete energy. This became the basis for quantum theory.

Middle years

Within 1916, Niels Bohr became a prof at a University of Copenhagen, & director of the new constructed "Institute of Theoretical Physics" within 1920. Within 1922, he was awarded the Nobel Prize in physics "for his services in the investigation of the structure of atoms and of the radiation emanating from them".

Bohr besides conceived a principle of complementarity: that items can be severally analyzed when with many contradictory properties. E.g., physicists presently conclude that weak is 2 the wave & water of particles - two apparently reciprocally exclusive properties - according to this principle. Bohr likewise uncovered philosophic applications for this daringly original principle. Albert Einstein much preferred a determinism of authoritative natural philosophy across a probabilistic freshly natural philosophy of Bohr (to which Max Planck and Einstein himself had contributed). He & Bohr experienced expert-natured arguments across a verity of this principle throughout their experiences. One of Bohr's best known students was Werner Heisenberg, a important figure in the development of quantum mechanics, world health organization was too head of the German atomic bomb task.

Niels Bohr & his married woman Margrethe got sise babies. 2 died immature, & virtually all of the others went in to lead successful inhabits. 1, Aage Niels Bohr, also became the super successful physicist; rather his father, he won the Nobel prize.

Later years, death, and legacy

Within 1941, during a German occupation of Denmark in World War II, Bohr was visited by Heisenberg in Copenhagen (watch next part). Around 1943, shortly before he was to become arrested per German constabulary, Bohr escaped to Sweden, and then travelled to London.

He worked at a secret Los Alamos laboratory in New Mexico, USA, on the Manhattan Project, where, based on data from Richard Feynman, he was known by the assumed title of Nicholas Baker for security reasons. Nevertheless his role in the plan was minor. He was seen as a knowledgeable advisor even or "father confessor" on the task. He wwhen caring all about the nuclear arms race, & is quoted as saying "That is why I went to America. They didn't need my help in making the atom bomb." [http://www.doug-long.com/bohr.htm].

Bohr believed minute secrets should exist as shared per international scientific community. When meeting by owning Bohr, J. Robert Oppenheimer suggested Bohr visit President Franklin Roosevelt to convince him that the Manhattan Project should be shared with the Russians in the hope of speeding up its results. Roosevelt recommended Bohr link to to England to try to win British approval. Churchill opposed the idea.

When a war he returned to Copenhagen, advocating a peaceful utilize of nuclear energy. He died around Copenhagen around 1962. He is buried in the Assistens Kirkegård in the Nørrebro section of Copenhagen.

A element bohrium is named inside his honor.

Relationship with Heisenberg
Werner Heisenberg claimed in an locate after a war, when andy skinner Robert Jungk was working on the book Brighter Than a Thousand Suns, that he experienced tried to establish a treaty by using Bohr such that man of science in neither side should assist have the atomic bomb. He too said that a German tries were totally revolve about energy production, & that his circle of colleagues tried to keep it that way. Heisenberg nuanced his claims, though, & avoided implication that he & his colleagues got intentionally sabotaged a bomb effort. Notwithstanding, this refinement was misused around Jungk's original publication of a book, which strongly implied that the German atomic bomb task was rendered by choice stillborn by Heisenberg.

Whenever Bohr saw this depiction in the Danish translation of Jungk's book, he disagreed wholeheartedly. He said that Heisenberg experienced indeed let him underst& within Copenhagen that he was working in an atomic bomb task, and that he thought that Germany would win a war. He dismissed a idea of any treaty as an when-a-fact construction. He drafted many letters to inform Heisenberg just about this however never sent any of the babies.[http://www.nbi.dk/NBA/release.html]

Michael Frayn's play Copenhagen, which ran on Broadway for a period, explores what may use happened at a 1941 meeting between Heisenberg & Bohr. the truth of the historical event is however a matter of scholarly debate.

Quotations

"Anyone who is not shocked by quantum theory has not understood a single word."

"Nothing exists until it is measured."

"Prediction is very difficult, especially about the future." from either Instance Magazine

"The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth."

Books about Bohr
Niels Bohr: A Human, His Science, & the World It Changed, by Ruth Moore ISBN 0262631016 ''Niels Bohr's Days, Around Physical science, Philosophy & Polity, by Abraham Pais, ISBN 0-19-852049-2 Suspended Around Language: Niels Bohr's Life, Discoveries, & A Century He Shaped'' by Jim Ottaviani (graphic novel) ISBN 0966010655

Note
Richard Rhodes, A Making of the Atomic Bomb, (Just released York: Simon & Schuster, 1986.), pgs. 528-531.