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Extra info for Atoms, Metaphors and Paradoxes: Niels Bohr and the Construction of a New Physics
It may thus be stated that, by revealing the existence of an indeterminate interaction setting limits to the divisibility of phenomena in the sense specified above, the quantum of action draws rigid boundaries for 1 The paradigm of complementarity 25 the information content derivable from any operation of measurement and, at the same time, defines the sphere of validity of the concepts whereby such information may be expressed without ambiguity. The mutual incompatibility - conceptual and practical - existing between space-time co-ordination and the laws of conservation destroys, as it were, the condition upon which the classical model of representation rests and thus demonstrates the need to abandon rigorously causal description for a type regarded by Bohr as richer.
It had, however, been an experience that was later to prove extremely fruitful, above all for the connections he had made in one of the most vital and prestigious centres of experimental study. It is to the studies carried out during his stay in England, especially after his move to Manchester in January 1912, that we owe the publication of a paper on the decrease of velocity of charged particles on passing through matter, from which he obtained further hints for his approach to the problem of atomic structure10.
Carl W. Oseen was professor of mathematical physics at the University of Uppsala from 1909 to 1933 and for more than a decade (193344) director of the Nobel Institute. His correspondence with Bohr, to whom he became strongly attached, began in 1911, when the latter sent him a copy of his doctorate thesis. 40 Bohr to Dirac, 24 March 1928, CW5, 44-46. 41 Ibid. 42 N. ' cit. n. 15, 486; CW6, 206; English trans. 101; CW6, 217. , 484; CW6, 204; English trans. 94; CW6, 210. , 485; CW6, 205; English trans.