Niels Bohr

Danish physicist and Nobel prize laureate, 1885-1962

Bohr developed the Bohr model of the atom, in which he proposed that energy levels of electrons are discrete and that the electrons revolve in stable orbits around the atomic nucleus but can jump from one energy level (or orbit) to another. Although the Bohr model has been supplanted by other models, its underlying principles remain valid. He conceived the principle of complementarity: that items could be separately analysed in terms of contradictory properties, like behaving as a wave or a stream of particles. The notion of complementarity dominated Bohr's thinking in both science and philosophy.

Source: Wikipedia

Bohr, Niels

physicist and Nobel Laureate (1885-1962). Signed photograph. no place; no date. 3.25 x 5 inch.
$ 3,481 / 3.000 € (83488)

Rare matte black and white photograph of Bohr in a head and shoulders pose with white border. Signed in blue ink, "Niels Bohr." Niels Bohr (1885-1962) was a Danish physicist. He received the Nobel Prize for Physics in 1922 for his work applying the quantum concept to the problem of atomic and molecular structure. Forced to flee Denmark after the Nazi occupation in 1943, he settled in Sweden briefly before moving to London. Bohr worked at Los Alamos on the Manhattan Project under the pseudonym Nicholas Baker and spent the next two years flying between London, Washington and Los Alamos.

He recognized early on how their work would complicate international relations and thus, spent the rest of his life advocating for passive applications of atomic energy..

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Bohr, Niels

dänischer Physiker, Nobelpreisträger; schuf die Grundlage der modernen Atomphysik (1885-1962). Eigenhändiger Brief mit Unterschrift. Kopenhagen. Gr.-8vo. 1 p. Gedr. Adresse. Mit eigenh. beschrifteten Kuvert.
$ 2,089 / 1.800 € (83494)

An Ashley T. Cole in New York. „I thank you for your kind note with the interesting information about your collection of autograph letters.“ Niels Bohr Autograph Letter Signed. One page, 6.25" x 7.75", no place; July 30, 1952. This brief letter, sent to Mr. Ashley T. Cole, reads in full: "I thank you for your kind note with the interesting information about your collection of autograph letters." Signed, "Niels Bohr." Niels Bohr (1885-1962) was a Danish physicist. He received the Nobel Prize for Physics in 1922 for his work applying the quantum concept to the problem of atomic and molecular structure.

Forced to flee Denmark after the Nazi occupation in 1943, he settled in Sweden briefly before moving to London. Bohr worked at Los Alamos on the Manhattan Project under the pseudonym Nicholas Baker and spent the next two years flying between London, Washington and Los Alamos. Bohr recognized early on how their work would complicate international relations and thus, spent the rest of his life advocating for passive applications of atomic energy. Uniformly toned with smoothed crease..

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Bohr, Niels

Physiker (1885-1962). Typed letter signed. Kopenhagen. 1 S. 4to. Beiliegend ein Kuvert mit roten Lacksiegeln des Instituts.
$ 2,901 / 2.500 € (49379/BN33757)

To the Austrian physicist Heinrich Mache at the Vienna University of Technology, thanking for a collection of rare-earth elements which the Austrian scientist Carl Auer von Welsbach had donated, and sending 500 Danish Crowns to support the University's scientific projects. - On stationery with printed letterhead of the Universitetets Institut for Teoretisk Fysik. Traces of folds.

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