About: http://webisa.webdatacommons.org/129473550

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	Plane waves are an idealization and can never be achieved in the real world because they must have an infinite spatial extent (and thus carry infinite energy) to work.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com