  According to General Relativity, there are three factors namely mass,
rotation and charge that can influence the path of light ray. Many authors
showed that there is another factor which can influence the path of light ray
namely gravitomagnetism. Here we discuss the effect of a rotating body with
non-zero (Kerr- Taub-NUT) magnetic field on the motion of light ray. We use the
null geodesic of photon method and obtain the deflection angle of light ray for
such a body up to fourth order term in the equatorial plane. Our calculation
shows that magnetism has a noticeable effect on the path of light ray. If we
set the magnetism equal to zero, our expression of bending angle reduces to the
Kerr bending angle. However, we get non-zero bending angle for a hypothetical
mass less, magnetic body.
