Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reflection of light from a uniformly moving mirror   We developed a formula for the law of reflection of a plane-polarized light
beam from an inclined flat mirror in uniform rectilinear motion by a direct
application of the Huygens-Fresnel principle. Applying the obtained formula and
the postulates of special relativity to describe a specific thought experiment,
we showed that the moving mirror must be contracted along the direction of its
motion by the usual Lorentz factor. The result emphasizes the reality of
Lorentz contraction by showing that the contraction is a direct consequence of
the first and second postulates of special relativity, and not a product of the
process of relativistic measurement of the length.

24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat