About: http://webisa.webdatacommons.org/81970050

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	If the two beams are just opposite, and we take that to mean they are identical except for their direction of the circular polarization, then the resulting wave is linearly polarized and has twice the original amplitude.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com