Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The transition from the ballistic to the diffusive regime in a turbid
  medium   By varying the absorption coefficient and width of an intralipid- India ink
solution in a quasi one-dimensional experiment, the transition between the
ballistic and the diffusive regimes is investigated. The medium's attenuation
coefficient changes abruptly between two different values within a single
mean-free-path. This problem is analyzed both experimentally and theoretically,
and it is demonstrated that the transition location depends on the scattering
coefficient as well as on the measuring solid angle.

21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin