Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards a more exact value of deflection of light due to static
  gravitational mass   The deflection of a ray of light passing close to a gravitational mass, is
generally calculated from the null geodesic which the light ray (photon)
follows. However, there is an alternate approach, where the effect of
gravitation on the ray of light is estimated by considering the ray to be
passing through a material medium. Calculations have been done in this paper,
following the later approach, to estimate the amount of deflection due to a
static non-rotating mass. The refractive index of such a material medium has
been calculated in a more rigorous manner in the present work and the final
value of amount of deflection calculated here is claimed to be more accurate
than all other values resulting from previous calculations.

29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex