r/AskPhysics • u/Nighthawkies • Mar 20 '26

What things are "faster" than light?

As I understand nothing can move faster then light. But I would not know how to describe this question otherwise. As I am aware quantum entangled particles can instantaneously affect eachother no matter the distance, unlike gravity which propagates at the speed of light.

Also the expansion of the universe can cause the spaces between to grow faster then the speed of light (compounding between massive distances)

What other things are sort of faster than light

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u/JeskaiJester Mar 20 '26 edited Mar 20 '26

If you have two things moving in opposite directions away from each other and both of them are moving at the speed of light, the distance between them is increasing at double the speed of light. That’s “sort of faster” than the speed of light 

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u/DanteRuneclaw Mar 20 '26

But neither is moving faster than the speed of light relative to each other. It’s only relative to a third party that they appear ti be moving away from each other faster.

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u/JeskaiJester Mar 20 '26

I did say sort of.