About: http://webisa.webdatacommons.org/19222302

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	However, the use of even shorter wavelengths (such as the F2 laser with a wavelength of 157 nm) is handicapped by the lack of suitable optical materials from which lenses or other optical components can be manufactured.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com