About: http://webisa.webdatacommons.org/448355287

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	Even with carefully chosen materials for the substrate glass, such as SF-57 or fused silica, a small retardance, such as 0.02??'s was used to compensate for residual light leakages in the dark state from stress birefringence.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es