https://en.wikipedia.org/wiki/Pavel_Cherenkov#Discoveries_in_physics
https://en.wikipedia.org/wiki/Cherenkov_radiation ,
https://www.youtube.com/watch?v=_Kf2f_9MfPc
https://www.google.ca/search?ei=Y_CtWveXPMmUjwOA06DoBw&q=cherenkov+radiation+&oq=cherenkov+radiation+&gs_l=psy-ab.3..0j0i67k1j0l8.11599.13066.0.14055.10.10.0.0.0.0.98.804.10.10.0....0...1c.1.64.psy-ab..0.10.800...0i22i30k1j0i22i10i30k1.0.XuPLirlADVc
