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  2. Faster-than-light - Wikipedia

    en.wikipedia.org/wiki/Faster-than-light

    In the context of this article, "faster-than-light" means the transmission of information or matter faster than c, a constant equal to the speed of light in vacuum, which is 299,792,458 m/s (by definition of the metre) [3] or about 186,282.397 miles per second. This is not quite the same as traveling faster than light, since:

  3. Tachyon - Wikipedia

    en.wikipedia.org/wiki/Tachyon

    The first hypothesis regarding faster-than-light particles is sometimes attributed to physicist Arnold Sommerfeld, who, in 1904, named them "meta-particles". [7] [8] The possibility of existence of faster-than-light particles was also proposed by Lev Yakovlevich Shtrum in 1923. [9]

  4. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    The speed of light is the upper limit for the speeds of objects with positive rest mass, and individual photons cannot travel faster than the speed of light. [39] This is experimentally established in many tests of relativistic energy and momentum .

  5. 2011 OPERA faster-than-light neutrino anomaly - Wikipedia

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

    The neutrinos were calculated to have arrived approximately 60.7 nanoseconds (60.7 billionths of a second) sooner than light would have if traversing the same distance in vacuum. After six months of cross checking, on September 23, 2011, the researchers announced that neutrinos had been observed traveling at faster-than-light speed. [6]

  6. Alcubierre drive - Wikipedia

    en.wikipedia.org/wiki/Alcubierre_drive

    The Alcubierre metric defines the warp-drive spacetime.It is a Lorentzian manifold that, if interpreted in the context of general relativity, allows a warp bubble to appear in previously flat spacetime and move away at effectively faster-than-light speed.

  7. Lighthouse paradox - Wikipedia

    en.wikipedia.org/wiki/Lighthouse_paradox

    This thought experiment proposes that light moving in this situation is actually traveling faster than the speed of light. This presents a paradox because, according to the theory 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, and nothing can ...

  8. Measurements of neutrino speed - Wikipedia

    en.wikipedia.org/wiki/Measurements_of_neutrino_speed

    The temporal distribution of the proton extractions was statistically compared with approximately 16000 neutrino events. OPERA measured an early neutrinos arrival of approximately 60 nanoseconds, as compared to the expected arrival at the speed of light, thus indicating a neutrino speed faster than that of light.

  9. Tachyonic field - Wikipedia

    en.wikipedia.org/wiki/Tachyonic_field

    In physics, a tachyonic field, or simply tachyon, is a quantum field with an imaginary mass. [1] Although tachyonic particles (particles that move faster than light) are a purely hypothetical concept that violate a number of essential physical principles, at least one field with imaginary mass, the Higgs field, is believed to exist.