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  2. Time dilation - Wikipedia

    en.wikipedia.org/wiki/Time_dilation

    The faster the relative velocity, the greater the time dilation between them, with time slowing to a stop as one clock approaches the speed of light (299,792,458 m/s). In theory, time dilation would make it possible for passengers in a fast-moving vehicle to advance into the future in a short period of their own time.

  3. Timeline of special relativity and the speed of light - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_special...

    the long story of spacetime and the concept of time as the fourth dimension; e.g. the ideas of Lagrange and Wells; mathematical innovations that influenced the formalism of SR, e.g. the introduction of fibre bundles; indirect evidence for SR, through the evidence for relativistic theories like general relativity or relativistic quantum mechanics;

  4. 2011 OPERA faster-than-light neutrino anomaly - Wikipedia

    en.wikipedia.org/wiki/2011_OPERA_faster-than...

    If neutrino and light speed were the same, a subtraction value of 1043.4 nanoseconds should have been obtained for the correction. However, the actual subtraction value amounted to only 985.6 nanoseconds, corresponding to an arrival time 57.8 nanoseconds earlier than expected. [12]

  5. Ladder paradox - Wikipedia

    en.wikipedia.org/wiki/Ladder_paradox

    The ladder paradox (or barn-pole paradox) is a thought experiment in special relativity.It involves a ladder, parallel to the ground, travelling horizontally at relativistic speed (near the speed of light) and therefore undergoing a Lorentz length contraction.

  6. Lorentz factor - Wikipedia

    en.wikipedia.org/wiki/Lorentz_factor

    Muons, a subatomic particle, travel at a speed such that they have a relatively high Lorentz factor and therefore experience extreme time dilation. Since muons have a mean lifetime of just 2.2 μs, muons generated from cosmic-ray collisions 10 km (6.2 mi) high in Earth's atmosphere should be nondetectable on the ground due to their decay rate ...

  7. Shapiro time delay - Wikipedia

    en.wikipedia.org/wiki/Shapiro_time_delay

    The Shapiro time delay effect, or gravitational time delay effect, is one of the four classic Solar System tests of general relativity. Radar signals passing near a massive object take slightly longer to travel to a target and longer to return than they would if the mass of the object were not present.

  8. Measurements of neutrino speed - Wikipedia

    en.wikipedia.org/wiki/Measurements_of_neutrino_speed

    A speed difference would lead to an elongation of the neutrino bunches and to a displacement of the whole neutrino time spectrum. At first, the speeds of muons and neutrinos were compared. [5] Later, also antineutrinos were observed. [6] The upper limit for deviations from light speed was:

  9. Postulates of special relativity - Wikipedia

    en.wikipedia.org/wiki/Postulates_of_special...

    1. First postulate (principle of relativity) The laws of physics take the same form in all inertial frames of reference.. 2. Second postulate (invariance of c) . As measured in any inertial frame of reference, light is always propagated in empty space with a definite velocity c that is independent of the state of motion of the emitting body.