author={Rainer Plaga},
  journal={Foundations of Physics Letters},
  • R. Plaga
  • Published 1 October 2000
  • Physics
  • Foundations of Physics Letters
Karl Popper proposed a way to test whether a proposed relation of a quantum-mechanical state to perceived reality in the Copenhagen interpretation (CI) of quantum mechanics—namely that the state of a particle is merely an expression of “what is known” about the system—is in agreement with all experimental facts. A conceptual flaw in Popper's proposal is identified and an improved version of his experiment (called “Extension step 1”)—which fully serves its original purpose—is suggested. The main… 

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