18th Nov, 2020
Milad Hajebrahimi
Isfahan University of Technology
I am very thankful to those who participated in this discussion.
I realized my mistake in the content of the questions raised in this discussion.
The questions I asked are not scientifically correct, as mentioned in one of the answers.
Finally, in what follows, I will correct questions and provide some answers to them:
Gravity is equivalent to the curvature of spacetime, not matter or energy!
The matter or energy forms the geometry (curvature), which is the same as gravity. According to John Wheeler: "
Matter forms geometry (spacetime) and the geometry tell matter how to move (moving along geodesics)."
The effect of energy (equivalent to matter) is to create spacetime and curvature in spacetime. It is natural that matter (energy) and spacetime are not independent of each other: if there is no matter (energy), neither will geometry (spacetime). The existence of spacetime is due to the existence of matter (energy).
Regards
Milad