Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Michelson interferometer in the field of a plane gravitational wave   We treat the problem of a Michelson interferometer in the field of a plane
gravitational wave in the framework of general relativity. The arms of the
interferometer are regarded as the world lines of the light beams, whose motion
is determined by the Hamilton-Jacobi equation for a massless particle. In the
case of a weak monochromatic wave we find that the formula for the delay of a
light beam agrees with the result obtained by solving the linearized coupled
Einstein-Maxwell equations. We also calculate this delay in the next
(quadratic) approximation.

34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph