About: http://webisa.webdatacommons.org/174593879

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	E l ?? ( w 2 ) 2 ??? k ??? E s , ( 23 ) where El is the laser energy, Es is the ambient light energy, k is a coefficient describing the visibility, and w is the diameter of the laser spot.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk