I have read this:
We know that neutrinos travel in vacuum very close to the speed of light (0.99c).
Neutrinos do have rest mass.
We know that in a thick medium, like glass, light travels slower then c (2/3c).
Neutrinos interact very weakly with matter, so their speed in glass would not really slow down.
We know that particles in a thick medium that travel faster then light, (they hit an electron and that will emit) emit Cherenkov radiation.
It would be possible for neutrinos to travel faster then light in glass. Light speed in glass is 2/3c which is slower then 0.99c.
- When neutrinos travel through glass, do they emit Cherenkov radiation? Why can't they themselves emit the Cherenkov, why can only electrons do it? Is there a QM explanation for charge to be a prerequisite for this?