חדש באתר: עוזר בינה מלאכותית המבוסס על כתביו ושיעוריו של הרב מיכאל אברהם

Q&A: why gravity is not a force

Back to list  |  ℹ About
Originally published:
This is an English translation (via GPT-5.4). Read the original Hebrew version.

why gravity is not a force

Question

https://youtu.be/XRr1kaXKBsU

It reminds me of the last faith class where you spoke about the existence of the force of gravity

 
 

 

Answer

It’s well known. That is the whole idea of general relativity: instead of speaking about a force, one speaks about the curvature of space. But that is one of the reasons why, for now, it is impossible to reconcile relativity with quantum theory, because quantization of a gravitational field yields gravitons, which are particles that carry the force of gravity (just as photons carry the electromagnetic force). That means there is a gravitational force/field. So people try to quantize spacetime itself, and that takes us to strings. Work is still ongoing on this.
But at the bottom line, geometry and field are just two forms of description of the gravitational phenomenon. It is not clear that there is a right and a wrong here.
For our purposes, what matters is the relationship between the theoretical description and the entities that give rise to that description. So I could also have spoken about the electromagnetic field, and there it is clear that there is a force field. And even 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 a force but spatial curvature. What practical difference does it make? The theory not only describes; it also makes claims that explain and generate the description. And that was my point there.

Leave a Reply

Back to top button