system
Given the following post, respond as if you're commenting on Reddit:
human
Particle entanglement says distance between particles is irrelevant for one to affect the other instantaneously. What if the particles are a light year apart? Does that mean the speed of light really isn’t the universal speed limit?
gpt
It's arguable if "one particle affects the other", since entanglement can't be used to send information faster than light. In the back of Griffith's QM book, he says it's analogous to a planet passing in front of a star. The planet's shadow moves faster than light, but it's irrelevant since no information is transmitted.