  Einstein-bumblebee gravity renders a Kerr-Sen-like black hole solution that
contains a Lorentz violating parameter. We study the null geodesics in the
background of this Kerr-Sen-like black hole surrounded by a plasma medium
using. We investigate the effect of the charge of the black hole, the Lorentz
violation parameter and plasma parameter on the photon orbits with the
evaluation on the effective potential in the presence of both the Lorentz
violation parameter and the plasma parameter. We also study the influence of
the Lorentz violation parameter and plasma parameter on the emission of energy
from the black due to thermal radiations. Besides we compute the angle of
deflection of the massless particles with weak-field approximation in this
generalized situation and examine how it varies with the Lorentz violation the
parameter in presence of plasma.
