2 votes

Can we use entangled particles to find out what is going on inside a black hole?

This is a version on steroids of the famous Einstein–Podolsky–Rosen Paradox. In General Relativity, to get out of a black hole requires you to move faster than light, so your question can essentially ...
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1 vote

FTL signaling by direction?

Yes, that would be FTL communication, but no it is not possible to do. To convince yourself, ask yourself: If person A measures first, which measurements can person B do, to tell which axis A measured ...
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