Editing Polarization (waves) (section)

=== Angular momentum using circular polarization ===
It is well known that electromagnetic radiation carries a certain linear [[momentum]] in the direction of propagation. In addition, however, light carries a certain [[angular momentum]] if it is circularly polarized (or partially so). In comparison with lower frequencies such as microwaves, the amount of [[Spin angular momentum of light|angular momentum in light]], even of pure circular polarization, compared to the same wave's linear momentum (or [[radiation pressure]]) is very small and difficult to even measure. However, it was utilized in an experiment to achieve speeds of up to 600 million revolutions per minute.<ref>{{cite web | title='Fastest spinning object' created | website=BBC News | date=2013-08-28 | url=https://www.bbc.com/news/uk-scotland-edinburgh-east-fife-23861397 | access-date=2019-08-27 | archive-date=2019-09-10 | archive-url=https://web.archive.org/web/20190910093348/https://www.bbc.com/news/uk-scotland-edinburgh-east-fife-23861397 | url-status=live }}</ref><ref>{{Cite journal|title=Laser-induced rotation and cooling of a trapped microgyroscope in vacuum|journal = Nature Communications|volume = 4|pages = 2374|first1=Kishan|last1=Dholakia|first2=Michael|last2=Mazilu|first3=Yoshihiko|last3=Arita|date=August 28, 2013|doi=10.1038/ncomms3374|pmid = 23982323|pmc = 3763500|hdl = 10023/4019|bibcode = 2013NatCo...4.2374A}}</ref>