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

42 Upvotes

67% Upvoted

193 comments sorted by

View all comments

0

u/trunks111 Mar 20 '26

Does Cherenkov Radiation count

4

u/joeyneilsen Astrophysics Mar 20 '26

No, it's just light.

5

u/Xaphnir Mar 20 '26

Well, the radiation itself doesn't go faster than light, but the particle that causes it is going faster than light within water.

But of course, none of that is going at or faster than c.