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I had a thought that's been bugging me and I wanted to ask some people who have more than a two semesters of physics about it.
Let's say I have a cord made out of a hypothetical material that can't bend, stretch, or condense. Now, I take that cord and span it across one light year. If person A on one end of the cord pulls it, would person B on the other end instantly see the cord getting pulled, or would it take a year for person B to notice it?
Let's say I have a cord made out of a hypothetical material that can't bend, stretch, or condense. Now, I take that cord and span it across one light year. If person A on one end of the cord pulls it, would person B on the other end instantly see the cord getting pulled, or would it take a year for person B to notice it?