About: http://webisa.webdatacommons.org/98787243

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 pulses having different magnitudes result from the rotating disk 230 being of a reflective material, such as aluminum, or having a light colored surface with the exception of the rotation indicator 235.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com