Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Results of a one-way experiment to test the isotropy of the speed of
  light   This paper presents the outcome of an experiment based on an improved version
of Fizeau's coupled-slotted-discs that tests the fundamental postulates of
Special Relativity for the one-way speed of light propagation. According to our
methodology, important phenomena - a limit on and the diurnal regularity of the
variation of the speed of light due to the movements of the Earth (assuming
that the speed of light follows a Galilean transformation) - can be tested by
the present experiment. However, these measurements do not indicate any
significant diurnal variation. Consequently, the limit of the present outcome
on the variation of the speed of light is insignificant. Assuming that the
speed of light is not invariant and performing a rigorous statistical analysis,
the limit established is approximately 1/50 of the previous Fizeau-type
experiment with 95% confidence level. These outcomes are consistent with the
assumptions of Einstein's Special Relativity.

18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph