>>13446176Congrats. You learned light travels at different speeds in different media like sound does.
>vacuumDoes it make sense to ask "what happens when you break the sound barrier in vacuum?" It doesn't. It also doesn't make sense "What happens when you break the light barrier in vacuum?". It's obviously presumed a medium exists in order to discuss what happens when you travel faster than sound or light in that medium and the answer for light is Cherenkov radiation.
>you're still retarded.I know you are, but what am I?