About: http://webisa.webdatacommons.org/301736037

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	2. a lens only changes the direction of light, the energy passing through it is unaltered. if not, the lens would undergo some sort of change as well, heating up or cooling off (absorbing or releasing energy respectively)
http://www.w3.org/ns/prov#wasQuotedFrom	askamathematician.com