Popper's experiment and the Copenhagen interpretation
arXiv:quant-ph/9910078
Abstract
Popper conceived an experiment whose analysis led to a result that he deemed absurd. Popper wrote that his reasoning was based on the Copenhagen interpretation and therefore invalidated the latter. Actually, Popper's argument involves counterfactual reasoning and violates Bohr's complementarity principle. The absurdity of Popper's result only confirms Bohr's approach.
13 pages LaTeX, one separate page of figures, submitted to SHPMP