About: http://webisa.webdatacommons.org/347341332

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	From a knowledge of the magnitudes of ??0 and ??0 he determined that the velocity of propagation of the electromagnetic wave is constant and equal to the speed of light and that light is an electromagnetic wave.
http://www.w3.org/ns/prov#wasQuotedFrom	mpoweruk.com