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  2. Event (relativity) - Wikipedia

    en.wikipedia.org/wiki/Event_(relativity)

    For example, a glass breaking on the floor is an event; it occurs at a unique place and a unique time. [1] Strictly speaking, the notion of an event is an idealization , in the sense that it specifies a definite time and place, whereas any actual event is bound to have a finite extent, both in time and in space.

  3. Relativity of simultaneity - Wikipedia

    en.wikipedia.org/wiki/Relativity_of_simultaneity

    [9] [10] [11] In 1908, Hermann Minkowski introduced the concept of a world line of a particle [ 12 ] in his model of the cosmos called Minkowski space . In Minkowski's view, the naïve notion of velocity is replaced with rapidity , and the ordinary sense of simultaneity becomes dependent on hyperbolic orthogonality of spatial directions to the ...

  4. Theory of relativity - Wikipedia

    en.wikipedia.org/wiki/Theory_of_relativity

    The laws of physics are the same for all observers in any inertial frame of reference relative to one another (principle of relativity). The speed of light in vacuum is the same for all observers, regardless of their relative motion or of the motion of the light source. The resultant theory copes with experiment better than classical mechanics.

  5. Twin paradox - Wikipedia

    en.wikipedia.org/wiki/Twin_paradox

    The general relativity solution for a static homogeneous gravitational field and the special relativity solution for finite acceleration produce identical results. [ 33 ] Other calculations have been done for the traveling twin (or for any observer who sometimes accelerates), which do not involve the equivalence principle, and which do not ...

  6. Location - Wikipedia

    en.wikipedia.org/wiki/Location

    For example, the position of New York City in the United States can be expressed using the coordinate system as the location 40.7128°N (latitude), 74.0060°W ( Absolute locations are also relative locations, since even absolute locations are expressed relative to something else. For example, longitude is the number of degrees east or west of ...

  7. Two-body problem in general relativity - Wikipedia

    en.wikipedia.org/wiki/Two-body_problem_in...

    For example, the Schwarzschild radius r s of the Earth is roughly 9 mm (3 ⁄ 8 inch); at the surface of the Earth, the corrections to Newtonian gravity are only one part in a billion. The Schwarzschild radius of the Sun is much larger, roughly 2953 meters, but at its surface, the ratio r s / r is roughly 4 parts in a million.

  8. Special relativity - Wikipedia

    en.wikipedia.org/wiki/Special_relativity

    In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time.In Albert Einstein's 1905 paper, On the Electrodynamics of Moving Bodies, the theory is presented as being based on just two postulates: [p 1] [1] [2]

  9. Principle of locality - Wikipedia

    en.wikipedia.org/wiki/Principle_of_locality

    [11]: 98 Consequently, Bell's theorem does not restrict the possibility of nonlocal variables as well as theories based on retrocausality or superdeterminism. [ 2 ] Because of the probabilistic nature of wave function collapse, this apparent violation of locality in quantum mechanics cannot be used to transmit information faster than light, in ...