About: http://webisa.webdatacommons.org/200338441

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	When two sets of interdigital electrodes are deposited on a piezoelectric crystal at a distance L apart, a standing wave is set up if L=N??, where N is an integer and ?? is the wavelength of the surface acoustic wave.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com