General relativity fundamentally changed our understanding of gravitation and spacetime, but it also led to modifications and extensions of various physical theories to incorporate the effects of gravity in a relativistic framework. Here are some key areas where general relativity has prompted modifications or expansions of existing physical theories: 1. **Newtonian Gravity**: Newton's law of universal gravitation was revised by general relativity, particularly by describing gravity not as a force but as a curvature of spacetime caused by mass.
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