About: http://webisa.webdatacommons.org/13971279

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	The dominant theory of the time was that light was a wave, but there was also the idea that maybe the ray was some type of unknown particle.
http://www.w3.org/ns/prov#wasQuotedFrom	ck12.org