How is it theoretically possible for gravity to have infinite range throughout the universe?
In: Physics
Gravity does not theoretically extend infinitely. This is a classical view of physics.
According to quantum mechanics there must exist a minimum “amount of gravity”, a gravity quantum.
The thing is according to relativity and classical physics, gravity *does* reach infinitely. This is one of the problems in merging relativity and QM, and is one of the great unsolved problems of physics. But this is more a problem of making relativity work at small scales, since we know that QM already works at that scale.
In other words, there is no reason to think that a grain of sand would affect another grain of sand on the opposite end of the universe gravitationally. To be fair, there is yet no evidence of quantum gravity, but if it doesn’t exist, then QM must be wrong, and that would be remarkable.
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