This paper provides new elements for reconstructing Heinrich Hertz's conversion from an electrodynamic concept to a concept of field theory, a process that took place between September 1887 and February 1888. First of all, it is argued that, contrary to what one could deduce from Hertz's own presentation in his Untersuchungen (or Electric Waves), paper N∘ 5 was actually written after the first publication of papers N∘ 6 and N∘ 7; this fact is illuminated by Hertz's unpublished correspondence (Section 1). (...) Following this reordering, an approximative process of Hertz's conversion based only on his published papers is described (Section 2). Second, by complementing Hertz's published Erinnerungen (or Memoirs, Letters, Diaries) with his unpublished Versuchsprotokolle (Laboratory notes), a much finer description of this conversion process is discussed (Section 3). It is finally concluded that Hertz's idea of “air waves” belongs at the very end of this process, and was mainly attained through experimental hints found within Helmholtz's theoretical framework. (shrink)

El electrón introduce en la mecánica subatómica el nuevo concepto de probabilidad cuántica. Este artículo estudia el proceso de esta introducción, de 1916 a 1927. Einstein lo ocasionó, al elaborar un formalismo de emisión y absorción de radiación, que Bohr incluyó en su principio de correspondencia, como «probabilidades a priori». Heisenberg las recogió en su mecánica matricial, mientras Schrodinger introducía en su mecánica ondulatoria una función de onda, que Born convirtió en amplitud de probabilidad. Dirac fundamentó esos conceptos de probabilidad (...) con su teoría de transformaciones, y Heisenberg, inspirado en ella, formuló las relaciones de indeterminación de la nueva física subatómica. (shrink)