What happens when we travel in a vechicle which travels at the speed of light ?
Nothing happens because it is impossible. Nothing happens because at the speed of light time stops. Nothing happens because at the speed of light you can be everywhere at once, but there isn’t anywhere, because the rest of the universe has been Lorentz contracted to zero size (enabling you to be everywhere at once, of course). It’s called ‘reduction ad absurdum’ because the consequences of traveling at the speed of light are absurd, so it doesn’t happen.
