About: http://webisa.webdatacommons.org/175354130

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 assumed to move in perfectly straight lines, neglecting any effects such as diffusion or refraction.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com