Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Description of diffraction grating experiments for photons and electrons
  in Feynman's space-time formulation of quantum mechanics: The quantum origins
  of classical wave theories of light and massive particles   The five laws of relativistic quantum mechanics, according to Feynman's path
integral formulation, are concisely stated and applied to experiments.
Reflection diffraction grating experiments for both photons and electrons are
analysed, in particular the Davisson-Germer experiment in which the wave-like
property of electrons was first established. It is shown how classical, purely
spatial, effective wave theories for both photons and electrons are predicted
by the path integral formulation of quantum mechanics. The standard Copenhagen
interpretation of wave mechanics is critically discussed in the light of the
described experimental applications of the path integral formulation.

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The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas