B Can gravitational force have influence on objects at infinitely long distances?

[shivakumar]

Can gravitational force have influence at objects at infinitely long distance? Is gravitational force in the form quantum packets?

 

[Ibix]

Classical models say yes, the reach is infinite. We don't have a working theory of quantum gravity so we don't know what that says. We do expect gravity to be quantised, we just don't know how it works.

 

[PeroK]

Can gravitational force have influence at objects at infinitely long distance? Is gravitational force in the form quantum packets?

Newton's law of gravity is $F = \frac{GMm}{r^2}$. There is no limit on the size of $r$.

Likewise if you look at, for example, the Schwarzschild metric in general relativity. There is no limit to the $r$ coordinate.

 

[Baluncore]

Can gravitational force have influence at objects at infinitely long distance?

Since gravity propagates at the speed of light, an infinitely long distance will take an infinitely long time. The original cause will be gone, long before the infinitesimal effect begins to be felt at an infinite distance.