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We know that Newton's law of gravitation does not perform as well as Einstein's general relativity. Scientists are now using energy-stress tensor to describe gravitational fields. Here comes my question: How do we interpret the other three forces? I am more familiar with the EM interaction. Let me focus on it.

When I first learn the Columb Force, my teacher told us that it behaves just like gravitation - both decay inverse squarely. Now, we have a new theory explaining gravity. Do we have a new theory for Columb force? I read some articles saying that string theory is trying to do this. My main concern is: do we find any inconsistency between experiments and our Columb Force theory, just like the case of Mercury's precession?

I look forward to your comments and opinions!