About: http://webisa.webdatacommons.org/226971346

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	FIG. 6 is an optical system with the light source located in an optically dense medium, illustrating a light ray undergoing reflection and refraction;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com