About: http://webisa.webdatacommons.org/366051140

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 stated earlier, the curvature of the wavefronts may be straightforwardly changed by lenses such as convex lenses and concave lenses.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca