  While amongst the most luminous objects in the universe, many details
regarding the inner structure of quasars remain unknown. One such area is the
mechanism promoting increased polarisation in the broad absorption line troughs
of certain quasars. This study shows how microlensing can be used to
differentiate between two popular models that explain such polarisation through
a realistic computational analysis. By examining a statistical ensemble of
correlation data between two observables (namely image brightness and
polarisation of the flux coming from the quasar), it was found that through
spectropolarimetric monitoring it would be possible to discern between a model
with an external scattering region and a model without one.
