GR and its bending of space time

[loic patry]

Hello
Maybe my question is dumb but is the bent of space time instant due to gravity?
If a mass pops into existence will space time be bent instantly ?
Intercations between forces are light speed but gravity is and is not a force depending on pov

 

[Dale]

If a mass pops into existence will space time be bent instantly ?

The theory which says that mass* bends spacetime also says that mass cannot pop into existence.

*mass technically should be the stress energy tensor

 

[Ibix]

If a mass pops into existence will space time be bent instantly ?

Mass or energy "just popping into existence" violates the conservation of energy. The conservation of energy turns out to be a direct consequence of Einstein's Field Equations, which are the things that describe curvature. So it is literally impossible to describe mass "just popping into existence" in general relativity.

Changes in the distribution of mass and energy can occur, such as two stars colliding. The effects of that change on curvature propagate outward at the speed of light (checking that statement is one of the jobs of the LIGO/VIRGO project).