Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Forces from highly focused laser beams: modeling, measurement and
  application to refractive index measurements   The optical forces in optical tweezers can be robustly modeled over a broad
range of parameters using generalsed Lorenz-Mie theory. We describe the
procedure, and show how the combination of experimental measurement of
properties of the trap coupled with computational modeling, can allow unknown
parameters of the particle - in this case, the refractive index - to be
determined.

24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an