Cherenkov radiation from a charge particle nearly at the speed of light moving in a medium with index of refraction n = 1.25. Wavefronts emitted at times 0,1...5 form a shock-front cone with an opening angle α=arcsin(0.8).
<a href="//commons.wikimedia.org/wiki/User:Pieter_Kuiper" title="User:Pieter Kuiper">Pieter Kuiper</a>
2007-06-22
<span class="int-own-work" lang="en">Own work</span>