The entire reason the particles can come in to existance is because the black hole curves spacetime enough to ‘eat’ one of the pair. It only exists because of the black hole. The particle leaving the black hole takes energy away because that area of spacetime now has less energy in it, meaning the black hole shrinks. The black hole isn’t magically adding energy to the space around it in order to create these pairs.
If you throw a ball away from you, yes you feel the force, but now you’ve sent a bunch of energy away from yourself in the ball. In effect, the black hole is ‘throwing’ particles away from itself by the simple act of eating part of the spawned particles.
I’ve explained it poorly, but PBS Spacetime has several great episodes on the specific phenominon.
The entire reason the particles can come in to existance is because the black hole curves spacetime enough to ‘eat’ one of the pair. It only exists because of the black hole. The particle leaving the black hole takes energy away because that area of spacetime now has less energy in it, meaning the black hole shrinks. The black hole isn’t magically adding energy to the space around it in order to create these pairs.
If you throw a ball away from you, yes you feel the force, but now you’ve sent a bunch of energy away from yourself in the ball. In effect, the black hole is ‘throwing’ particles away from itself by the simple act of eating part of the spawned particles.
I’ve explained it poorly, but PBS Spacetime has several great episodes on the specific phenominon.