3 ms·

Nope. All physical effects are bounded by the speed of light. (As far as anyone knows, anyway.) The only weird one is quantum entanglement, but even then infor

Nope. All physical effects are bounded by the speed of light. (As far as anyone knows, anyway.) The only weird one is quantum entanglement, but even then information transfer doesn't travel faster than light and that's about all I know on that subject.

rl3 4y ago
>The only weird one is quantum entanglement, but even then information transfer doesn't travel faster than light ... For anyone wondering why that is, I found this explanation super interesting: https://www.forbes.com/sites/startswithabang/2020/01/02/no-we-still-cant-use-quantum-entanglement-to-communicate-faster-than-light/ https://www.forbes.com/sites/startswithabang/2020/01/02/no-w...
- drewtato 4y ago
  I also liked this explanation: https://www.youtube.com/watch?v=v7jctqKsUMA https://www.youtube.com/watch?v=v7jctqKsUMA In short, the only information you gain is about the outcome of the other side's measurement. They cannot introduce information into the particle, and thus can't transmit information. The only thing you learn is what you already knew: the other particle had a 50% chance of being in one state or another, with the added fact that it's now correlated to your particle with a 75% (depending on experiment) chance. This is information that didn't exist until that moment, so it couldn't have been sent out and reach you before you measure your particle, which would inform you with 75% certainty how your particle would act and break causality.
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saberience 4y ago
Why does gravity travel at the speed of light?
- rieTohgh6 4y ago
  Well the other way to look at it is: gravity travels at maximum possible speed in this universe. Light in vacuum can also reach same maximum speed. I guess we would say the light travels with speed of gravity if we measured them in other order.
dorgo 4y ago
> All physical effects are bounded by the speed of light. The universe expands faster than light. So this expansion is not a physical effect?
- orestarod 4y ago
  The universe expanding is a property of space itself. And "faster than light" is only because miniscule space expansion in any quantum of space adds up with distance, e.g. 1 picometer per kilometer per second, add enough trillions of kilometers and you get that faster than light expansion. There is no mass, particle or information moving THROUGH space faster than the speed of light, which is what the said limit concerns.

rl3 4y ago

>The only weird one is quantum entanglement, but even then information transfer doesn't travel faster than light ... For anyone wondering why that is, I found this explanation super interesting: https://www.forbes.com/sites/startswithabang/2020/01/02/no-we-still-cant-use-quantum-entanglement-to-communicate-faster-than-light/ https://www.forbes.com/sites/startswithabang/2020/01/02/no-w...

drewtato 4y ago
I also liked this explanation: https://www.youtube.com/watch?v=v7jctqKsUMA https://www.youtube.com/watch?v=v7jctqKsUMA In short, the only information you gain is about the outcome of the other side's measurement. They cannot introduce information into the particle, and thus can't transmit information. The only thing you learn is what you already knew: the other particle had a 50% chance of being in one state or another, with the added fact that it's now correlated to your particle with a 75% (depending on experiment) chance. This is information that didn't exist until that moment, so it couldn't have been sent out and reach you before you measure your particle, which would inform you with 75% certainty how your particle would act and break causality.

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saberience 4y ago

Why does gravity travel at the speed of light?

rieTohgh6 4y ago
Well the other way to look at it is: gravity travels at maximum possible speed in this universe. Light in vacuum can also reach same maximum speed. I guess we would say the light travels with speed of gravity if we measured them in other order.

dorgo 4y ago

> All physical effects are bounded by the speed of light. The universe expands faster than light. So this expansion is not a physical effect?

orestarod 4y ago
The universe expanding is a property of space itself. And "faster than light" is only because miniscule space expansion in any quantum of space adds up with distance, e.g. 1 picometer per kilometer per second, add enough trillions of kilometers and you get that faster than light expansion. There is no mass, particle or information moving THROUGH space faster than the speed of light, which is what the said limit concerns.