About: http://webisa.webdatacommons.org/130666844

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	Light waves and other forms of electromagnetic radiation bend whenever they pass from one medium to another.
http://www.w3.org/ns/prov#wasQuotedFrom	science20.com