Spacetime is any mathematical model that fuses the three dimensions of space (length, width, and depth) and the one dimension of time into a single four-dimensional manifold. It represents the “stage” in which physical phenomena take place.

Spacetime is a physical concept that combines our classic traditionally distinct notions of space and time into a single homogeneous entity. The introduction of spacetime is a direct consequence of the special theory of relativity, which establishes an equivalence between space and time.

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