Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rayleigh-Sommerfeld scalar diffraction by apertures moving at
  relativistic speeds   We have analytically obtained the theoretical results for the
Rayleigh-Sommerfeld (R-S) scalar diffraction by apertures, such as single-slit,
double-slit, grating and circular aperture, moving at relativistic speeds with
the velocities perpendicular to the direction of incidence. We also have
studied diffraction by a single-slit of oscillatory shutter. Our study would be
significant in probing the relativistic transverse Doppler effect on the
intensity pattern of the diffracted field.

20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex