About: http://webisa.webdatacommons.org/199699607

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	However, plane waves are an idealization and in practice, optical beams are often much closer to reality.
http://www.w3.org/ns/prov#wasQuotedFrom	opticsinfobase.org