About: http://webisa.webdatacommons.org/132566871

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	While the refraction angle ??t depends on the refractive index n of the media through which the incident and refracted rays propagate, such as air and quartz, the reflection angle ??r always equals the angle of incidence ??i.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com