About: http://webisa.webdatacommons.org/425097998

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	A reflector 279, such as a mirror, reflective coating or other reflector is disposed over the lower portion of the surface 374 of the prism 202 to reflect the light back through the prism.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com