  The small atmosphereless objects of our solar system, such as asteroids, the
moon are covered by layer of dust particles known as regolith, formed by
meteoritic impact. The light scattering studies of such dust layer by
laboratory experiment and numerical simulation are two important tools to
investigate their physical properties. In the present work, the light scattered
from a layer of dust particles, containing 0.3{\mu}m Al2O3 at wavelength 632.8
nm is analysed. This work has been performed by using a light scattering
instrument 'ellipsometer', at the Department of Physics, Assam Universiy,
Silchar, India. Through this experiment, we generated in laboratory the
photometric and polarimetric phase curves of light scattered from such a layer.
In order to numerically simulate this data, we used Hapke's model combined with
Mie's single particle scattering properties. The perpendicular and parallel
components of single particle albedo and the phase function were derived from
Mie theory. By using the Hapke's model combined with Mie theory, the physical
properties of the dust grain such as grain size, optical constant (n,k) and
wavelength can be studied through this scheme. In literature, till today no
theoretical model to represent polarisation caused due to scattering from rough
surface is available, which can successfully explain the scattering process. So
the main objective of this work is to develop a model which can theoretically
estimate polarisation as caused due to scattering from rough surface and also
to validate our model with the laboratory data generated in the present work.
