UvA - DARE ( Digital Academic Repository ) Communicating the Heisenberg uncertainty relations : Niels Bohr

The Einstein–Rupp experiments have been sadly neglected in the history of quantum mechanics. While this is to be explained by the fact that Rupp was later exposed as a fraud and had fabricated the results, it is not justified, due to the importance attached to the experiments at the time. This paper discusses Rupp’s fraud, the relation between Einstein and Rupp, and the Einstein-Rupp experiments, and argues that these experiments were an influence on Bohr’s development of complementarity and Heisenberg’s formulation of the uncertainty relations.