eli5 how do we know nothing is faster than light?
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The speed of light seems to the same, no matter your point of view or how fast you move.
If you assume that is the case, then it turns out that anything going slower than light (which, by the way, is every bit of matter we’ve ever seen), then it can’t end up going faster than light.
Think about it, no matter how fast you go, light goes ‘the speed of light’ faster than you, so you can never catch up, no matter how fast you move!
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The maths appears symettrical, so, hypothetically, if something was going faster than the speed of light, then maybe it would be forced to always go faster than light, and be unable to slow down.
So, even if there are a lot of ‘superliminal’ objects, we might struggle to detect them due to their strange behaviour. But, I think more likely is that they simply don’t exist.
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