About: http://webisa.webdatacommons.org/297916452

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 scanning beam diameter D is determined by an F number and an aperture W as follows. ##EQU8## where k is a constant.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com