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1. Curvature Spacetime

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   A key observable consequence of spacetime curvature is the gravitational redshift. Photons climbing out of a potential well (a region of positive curvature corresponding to a massive body) lose energy, causing their frequency to decrease (shift toward the red end of the spectrum). This phenomenon is directly proportional to the magnitude of the potential gradient experienced by the photon's path through the curved manifold [3].
   The degree to which spacetime becomes "depressed" by massive objects is known to be inversely proportional to …