About: http://webisa.webdatacommons.org/323654258

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 is an electromagnetic wave whose wave fronts are electric and magnetic field vectors, both of which, according to Maxwell's equations, must be perpendicular to the direction in which the wave travels (the light ray).
http://www.w3.org/ns/prov#wasQuotedFrom	usc.edu