Effect of light on gravitational attraction

It is shown in the first part that when a 30 degrees laminar beam of 1.5 W red laser light passes between a freely moving mass on a torsion pendulum and a fixed mass, there is an increase of the attraction between the two masses. In the second part, when a laminar light beam passes close to a freely moving single mass on a torsion pendulum, the mass will move toward the light beam. (C) 2011 Physics Essays Publication. [DOI: 10.4006/1.3653936]