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Created page with "== Introduction == The Shapiro time delay, also known as the gravitational time delay, is a phenomenon predicted by the theory of General Relativity. It describes the effect of gravity on the propagation of light, where light traveling through a gravitational field experiences a delay compared to its travel time in the absence of such a field. This effect was first predicted by Irwin I. Shapiro in 1964 and has since been confirmed through numerous experiments an..."
