<http://webisa.webdatacommons.org/270966834>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<phys.org> .
<http://webisa.webdatacommons.org/prov/14776846>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/270966834> .
<http://webisa.webdatacommons.org/270966834>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/270966834>	<http://www.w3.org/ns/prov#value>	"ws them to achieve the same result as concentration without tracking.The best example of this trade-off of photon energy versus intensity is a laser which is pumped by photons in all directions and emits lower-energy photons in one direction." .