This is a little confusing to me. Could the gravity not be the parabolic reflector? The actual black hole itself is creating the "dent" in spacetime and the gr

This is a little confusing to me. Could the gravity not be the parabolic reflector? The actual black hole itself is creating the "dent" in spacetime and the gravitational lensing is "pushing" the forces in a parabolic manner. Since that gravitational lensing keeps things focused for a very huge distance, it could keep the beam collimated, no? Sorry, I love this topic, but I don't know much about physics. This might be a really dumb question.