I posted this somewhere else, so I'll just copy and paste it here:
Second, one simply cannot move at the same speed as light, due to special relativity and electromagnetism. The way electromagnetic waves, i.e. light, is structured is such that it can only exist if it moves at a very specific speed, namely the speed of light. It has to move at this exact speed in all frames of reference, otherwise light cannot exist. Hence, no matter how fast you move relative to a photon, the photon will still move at the speed of light relative to you; time dilation is merely a consequence of this fact. There is an equation used to predict time dilation, determined by speed. The equation gives division by zero if the speed is equal to the speed of light. If the speed is larger than the speed of light, however, you get an imaginary number, so we have no clue what is physically going on there. Related to time dilation, it requires infinite energy if you want to accelerate yourself to the speed of light, so you can’t do it.
Am I the only one who thinks that quantum mechanics and relativity should be taught in elementary school? It's saddening to see so many people having not even the slightest clue how the universe really works. I mean, you don't have to teach the complicated mathematical details, but the basic gist shouldn't be that hard.
High five. They're simple to understand. Just need to remember the concepts, not the math.
