A laser beam can be twisted and move like a vortex, and for the first time researchers have made one that has different twists along the length of the beam
Source:
https://www.newscientist.com/article/2207852-new-kind-of-light-is-a-vortex-beam-that-twists-faster-as-it-moves/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home