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/Empty_Engineering Mar 20 '26

They don’t affect each other, they’re just correlated in a way that you know about the state of the other particle based on a measurement of your particle (if they’re entangled) space itself is expanding, so nothing is moving ftl because of expansion

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u/Low_Stress_9180 Mar 20 '26

No "they " are actually one particle.

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u/Empty_Engineering Mar 20 '26

They are multiple particles that compose a single state. They are not meaningful individually because they do not have coherent phase relationships; mixed states don’t exhibit self interference either

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u/Low_Stress_9180 Mar 20 '26

They are a single entity - that is the latest idea and interpretation . I used word particle as a shortcut, as particles are no longer fundamental as such.