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Physics

What Can we Say about a Photon’s Past?

Jeff S. Lundeen

Published Dec 9, 2013• 5 citations
Publisher

Abstract

An experiment demonstrates that even when physicists think a quantum particle has followed a single path it might not have.
DOI
10.1103/physics.6.133

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Recently, Nature magazine made a survey about how Physicists think of what quantum mechanics says about reality. The survey shows that 47% of respondents consider the wavefunction in the quantum mechanics representing simply a useful tool, and 36% respondents consider the wavefunction representing something real. In this article we show that the double slit experiments support the opinion of 47% of respondents. It is the standard understanding that the double slit experiment shows that the light is waves, not particles. The photoelectric experiment shows that the light is particles. The two experiments show the conceptually different natures of the light and thus led to the wave-particle duality of the light. To thoroughly study the real nature of the light in the double slit experiments, we utilizing the Photon-chamber, Shield, Blocker, Lenses and Metal tubes respectively. We observed the following phenomena in the same double slit experiments: the light is photons, not waves; and it is the photons that produce both the non-interference patterns in Zone-0, Zong-1 and Zone-2, and the interference patterns in Zone-3. We suggest that the observed phenomena: (1) invalidate the wave-particle duality; (2) show that the wavefunction is simply a useful mathematical tool to describe the wave phenomena in Zone-3; (3) show that the wavefunction cannot be utilized to describe the no-wave phenomena in Zone-0, Zong-1 and Zone-2; (4) support the particle reality of quantum mechanics.