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Originally Posted by AntonioLao EM and gravity have the same effectiveness both are long range forces that correspond to the inverse square law of force. However, the electromagnetic interaction that binds an electron and a proton in a hydrogen atom is the inconceivably large number of 10^{41} times stronger than gravity. |
There are three factors I want to mention, which I believe are the clue to solve this and to find the connection between EM an gravity:
1. The spacetime particles: how they are, their porperties, their interaction with or when there are gravitons or photons...
2. The premitivity and permeability, both values definatelly have a relationship.
3. The coupling constants.