About: http://webisa.webdatacommons.org/376198448

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 frequency has to be higher than the cut-off frequency , which is determined by and the mode numbers.Using cylindrical coordinates and taking the wave propagation direction as the axis, the fields are a function of , , , and .
http://www.w3.org/ns/prov#wasQuotedFrom	wolfram.com