About: http://webisa.webdatacommons.org/13300330

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	As a low-refraction material, it is possible to use SiO2, for example; and TiO2 is a suitable example of a high-refraction material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com