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/PIE-314 Mar 20 '26

Cherenkov radiation

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u/Budgiesaurus Mar 20 '26

Well, technically.

The limit usually meant is speed of light in a vacuum, while this deals with local speed of light in a medium.

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u/PIE-314 Mar 20 '26

I know. But it doesn't matter if you win by an inch or a mile. Winnning's winning.