I don’t think curve-fitting is quite the right idea in reference to general relativity—the equivalence principle is parameter-free. But the principle does take the fact that masses attract as given, and the rubber sheet analogy doesn’t help explain why it should be so. In the end, I think you’re right (to the degree that you concur with byrnema’s excellent comment).
I don’t think curve-fitting is quite the right idea in reference to general relativity—the equivalence principle is parameter-free. But the principle does take the fact that masses attract as given, and the rubber sheet analogy doesn’t help explain why it should be so. In the end, I think you’re right (to the degree that you concur with byrnema’s excellent comment).