- #1
auxengin
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As per the theory of general relativity nothing can travell faster than the speed of light. Therefore we would always be in the past light cone of a distant celestial body, say planet X in another solar system, that is 100 light years away. A minimum of 100 years would have to lapse before an event that occurred on that planet would have any effect on us. However in a hypothetical situation, if there existed a perfectly taut and non deformable (cannot be stretched) chord or rope between that planet and ours, a person on planet X would be able to signal us immediately by just pulling on the chord, thus sending a signal faster than light. Is this possible?