About: http://webisa.webdatacommons.org/329106258

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	Such rays as x can be intercepted by one or more mirrors 186 and reflected along path x' to mirror 188 where it is reflected a second time along path x within the beam of useful light.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com