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Elsevier eBooks

The “Past” and the “Delayed-Choice” Double-Slit Experiment

JOHN ARCHIBALD WHEELER

Published Jan 1, 1978• 417 citations
Publisher
DOI
10.1016/b978-0-12-473250-6.50006-6

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The interpretations of the delayed-choice experiments suggest that photons i°retroactively decidei± to travel as particles or as waves from the time of its emission. To test the interpretations thoroughly, we propose and perform novel extended-delayed-choice experiments. The experiments are designed for easier to set up, carry out and reach meaningful results without ambiguity. The experimental results show the following: (A) The present does not decide the past retroactively, i.e., the causality holds; (B) Bohri¯s complementarity principle is challenged; (C) photons behave as particle before striking on a double-slit/cross-double-slit; (D) Particle nature is intrinsic.