Spin and Orbital angular momentum

Spin angular momentum and orbital angular momentum are caused only by the changing polarisation in the beam. It is the orientation of the polarisation within each beam that creates the different rotation axes for the test particles. The following video shows how polarisation angles within a cross section of the beam rotate. And the superimposed bars show the overall direction of rotation of the total thrust of the changing polarisation angles. It is worth noting that the OAM cross section has a double barred overall rotation. This corresponds to the greater momentum observed in OAM.



https://youtu.be/xbuwv-zzIaY