Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Shadows over the speed of light   In this paper, we discuss some of the consequences of the CGPM (1983)
definition of meter and, in particular, we discuss giving the speed of light an
exact value. It is shown that this act touches the fundamental paradigms, such
as the second postulate of the special theory of relativity (STR), the
c-equivalence principle and the method of time synchronization. In order to
fill the arising logical gaps, we suggest, among others, to weaken the second
postulate of STR to a form directly confirmed by experiments and make new
measurements of Maxwell's constant with accuracy comparable with that of the
speed of light.

30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess