I give up.
Tell me the difference between orbital angular momentum and circular polarization.
I’m expecting a real knee slapper of an answer.
I’ll pass the request to some RATs. They know all about spin
Polar is based on phase. Momentum is based on angular velocity.
The orbital angular momentum of light (OAM) is the component of angular momentum of a light beam that is dependent on the field spatial distribution, and not on the polarization. It can be further split into an internal and an external OAM. The internal OAM is an origin-independent angular momentum of a light beam that can be associated with a helical or twisted wavefront. The external OAM is the origin-dependent angular momentum that can be obtained as cross product of the light beam position (center of the beam) and its total linear momentum.