Figure 5. Diagram of precession motion of mass inside a vortex. is the vortex precession frequency, is the total vortex spin; is the radius of the circular motion of mass inside the vortex

From

An Analogy Between the Properties of Light and Properties of Vortex-Wave Process in the Medium Similar to Superfluid 3Не-В

Liudmila B. Boldyreva

International Journal of Physics. 2015, 3(2), 74-83 doi:10.12691/ijp-3-2-5