About: http://webisa.webdatacommons.org/82291678

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	For example, they can be reflected from surfaces, they can undergo diffraction around obstacles, and they can experience refraction when passing between two different media, such as air and water, all in a similar manner to light.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.org