The elegant theory of general relativity from "summary" of Seven Brief Lessons on Physics by Carlo Rovelli
General relativity is the theory that describes the force of gravity. It was formulated by Albert Einstein in 1915 and remains one of the most beautiful and successful theories in physics. The elegance of general relativity lies in its simplicity and power. At its core, the theory proposes that gravity is not a force that acts at a distance, but rather a curvature in the fabric of spacetime. Imagine spacetime as a trampoline, with massive objects like the sun causing a depression in the fabric. When smaller objects like planets move around the larger ones, they follow curved paths dictated by the shape of this trampoline. This conceptual shift from a force-based view of gravity to a geometric view is what makes general relativity so elegant and captivating. The equations of general relativity are complex and involve ...
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