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relativity theory

The modern theories of space and time that go back to Albert Einstein: His special theory of relativity, which leaves out the effects of gravitation, and his general theory of relativity, in which gravitation makes itself felt as a distortion of space and time.

For an introduction to the basics of both theories of relativity, check out the chapters Special relativity and General relativity in Elementary Einstein.


  • theory of relativity
  • theories of relativity