About: http://webisa.webdatacommons.org/5777370

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	In general, the term birefringence is a quantitative means of identifying such localized differences in refractive index, region by region within the molded optical product.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es