Why is gravity not a force?
I’m giving you the last lesson in faith that you talked about the existence of the force of gravity.
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Known. This is the whole idea of general relativity, where instead of force we talk about the curvature of space. But this is one of the reasons why for now it is impossible to reconcile relativity with quantum, since quantization of a gravitational field yields gravitons, which are particles that carry the gravitational force (just as photons carry the electromagnetic force). This means that there is a gravitational force/field. So they try to quantize space-time itself and this takes us to strings. They are still working on it.
But the bottom line is that geometry and the field are just two ways of describing the gravitational phenomenon. It’s not clear that there is a right or wrong here.
For our purposes, what is important is the relationship between the theoretical description and the entities that give rise to the description. Therefore, I could also talk about the electromagnetic field, and there is clearly a force field. And in the gravitational context, even if you accept the picture that emerges from general relativity, the description is still created by something in reality. In this case, it is not about a force but about a spatial curvature. What about the NPM? The theory not only describes but also makes claims that explain and generate the description. And that was my argument there.
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