About: http://webisa.webdatacommons.org/183599090

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	Consider, for example, one of the simplest light beams: a Gaussian light beam, such as the one generated by a laser pointer.
http://www.w3.org/ns/prov#wasQuotedFrom	opfocus.org