Main Question or Discussion Point
In physics questions, objects are shown to travel at relativistic speeds, like 0.6c or 0.8c. This is all hypothetical, right? So how come an answer which generates a speed above the speed of light is wrong? Wouldn't one be travelling faster than the speed of the light if you were travelling in a spaceship at the speed of light, but running from one end to the other end? When I asked my teacher this, he said that its not possible, even taken hypothetically. Why is this?