Date (happened)
  • 1949 (probable)
    derived from the event's own title: "Richard Feynman publishes the discussed physics principle in 1949"
  • 1949
    Neville explicitly identifies 1949 as the year of the discussed discovery/publication.
Told / reported
15 June 1970
Direct telling witness in lecture 1512.
Persons
Richard Feynman