Hey guys, I'm new to to this Physics Forum. In fact, this is my first post ever. So I hope this question hasn't been asked and answered a billion times already. Suppose that you have an experiment set up where two particles that are in a vacuum with each other become entangled and then one is sent rocketing off at near light-speeds. If you measured the stationary particle, would the other one, who is flying around near the speed of light, react instantly or would it take longer to react (from the spectator's view point) because it is moving through time slower? Or is an experiment like this even possible? Thanks. This has been keeping me up at night!