Editing Collimated beam (section)

===Synchrotron light===
[[Synchrotron light]] is very well collimated.<ref>{{cite book|title=Synchrotron Radiation Research|last1=Winick|first1=Herman|last2=Doniach|first2=S|date=2012|publisher=[[Springer Science & Business Media]]|isbn=9781461579984|page=567}}<!--|access-date=6 August 2015 --></ref> It is produced by bending relativistic electrons (i.e. those moving at [[Special relativity|relativistic]] speeds) around a circular track. When the electrons are at relativistic speeds, the resulting radiation is highly collimated, a result which does not occur at lower speeds.<ref>{{cite book|title=Synchrotron Radiation: Basics, Methods, and Applications|last1=Mobilio|first1=Settimio|last2=Boscherini|first2=Federico|last3=Meneghini|first3=Carlo|date=2014|publisher=Springer|isbn=9783642553158|page=31}}<!--|access-date=6 August 2015 --></ref>