About: http://webisa.webdatacommons.org/149758641

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	Maxwell showed that such a wave had properties actually observed in light, and proposed that the added term was indeed necessary, and that light was an electromagnetic (EM) wave.
http://www.w3.org/ns/prov#wasQuotedFrom	nasa.gov