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  2. Hafele–Keating experiment - Wikipedia

    en.wikipedia.org/wiki/Hafele–Keating_experiment

    Hafele and Keating aboard a commercial airliner, with two of the atomic clocks One of the actual HP 5061A Cesium Beam atomic clock units used in the Hafele–Keating experiment The Hafele–Keating experiment was a test of the theory of relativity .

  3. Experimental testing of time dilation - Wikipedia

    en.wikipedia.org/wiki/Experimental_testing_of...

    Relation between the speed and the Lorentz factor γ (and hence the time dilation of moving clocks). Time dilation as predicted by special relativity is often verified by means of particle lifetime experiments. According to special relativity, the rate of a clock C traveling between two synchronized laboratory clocks A and B, as seen by a ...

  4. Twin paradox - Wikipedia

    en.wikipedia.org/wiki/Twin_paradox

    The ideal clock is a clock whose action depends only on its instantaneous velocity, and is independent of any acceleration of the clock. Wolfgang Rindler (2006). "Time dilation". Relativity: Special, General, and Cosmological. Oxford University Press. p. 43. ISBN 0-19-856731-6. Gravitational time dilation; time dilation in circular motion

  5. Time dilation - Wikipedia

    en.wikipedia.org/wiki/Time_dilation

    The clock hypothesis was implicitly (but not explicitly) included in Einstein's original 1905 formulation of special relativity. Since then, it has become a standard assumption and is usually included in the axioms of special relativity, especially in light of experimental verification up to very high accelerations in particle accelerators. [32 ...

  6. Einstein synchronisation - Wikipedia

    en.wikipedia.org/wiki/Einstein_synchronisation

    Einstein synchronisation (or Poincaré–Einstein synchronisation) is a convention for synchronising clocks at different places by means of signal exchanges. This synchronisation method was used by telegraphers in the middle 19th century, [citation needed] but was popularized by Henri Poincaré and Albert Einstein, who applied it to light signals and recognized its fundamental role in ...

  7. 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 ]

  8. How close is humanity to self-destruction? Doomsday Clock ...

    www.aol.com/close-humanity-self-destruction...

    The clock is meant as a metaphor for how close humanity is to self-annihilation, according to the Bulletin of the Atomic Scientists, which has maintained it since 1947. The group was founded two ...

  9. Tests of special relativity - Wikipedia

    en.wikipedia.org/wiki/Tests_of_special_relativity

    Special relativity also predicts that two light rays traveling in opposite directions around a spinning closed path (e.g. a loop) require different flight times to come back to the moving emitter/receiver (this is a consequence of the independence of the speed of light from the velocity of the source, see above).