Movement of a millimeter-sized oil drop pushed by optical force
Zhang Li, She Wei-Long†
       
Schematic diagram of the force analysis. The lower transparent body denotes the amplified oil drop. The cylinders with an arrow represent the incident and transmitted rays. n 1, n 2, and n 3 signify the refractive indices of the air, oil, and sucrose solutions respectively. The dot of a is the incident point of the first experiment. The O point is the spherical cap-top (the incident point of the second experiment).