The theory of relativity, or simply relativity in physics, usually encompasses two theories by Albert Einstein: special relativity and general relativity. [1] (The word relativity can also be used in the context of an older theory, that of Galilean invariance.)
The theory of relativity, or simply relativity in physics, usually encompasses two theories by Albert Einstein: special relativity and general relativity. [1] (The word relativity can also be used in the context of an older theory, that of Galilean invariance.)