Trajectory around a spherically symmetric non-rotating black hole
  Trajectory of a test particle or a photon around a general spherical black hole is studied and bending of light trajectory is investigated. Pseudo-Newtonian gravitational potential describing the gravitational field of the black hole is determined and is compared with the related effective potential for test particle motion. As an example, results are presented for Reissner-Nordstr\"{o}m black hole. 
Sumanta Chakraborty and Subenoy Chakraborty
gr-qc