- #1
JoePhysicsNut
- 35
- 0
Why must the charged particle that leads to Cherenkov radiation travel faster than the phase velocity of light not the group velocity of light?
One of the sides of the triangle that is used to define cosθ is v=c/n i.e. the phase velocity. I don't see why it's one rather than the other.
Thanks!
One of the sides of the triangle that is used to define cosθ is v=c/n i.e. the phase velocity. I don't see why it's one rather than the other.
Thanks!