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  2. Tachyon - Wikipedia

    en.wikipedia.org/wiki/Tachyon

    The possibility of standard model particles moving at faster-than-light speeds can be modeled using Lorentz invariance violating terms, for example in the Standard-Model Extension. [19] [20] [21] In this framework, neutrinos experience Lorentz-violating oscillations and can travel faster than light at high energies. This proposal was strongly ...

  3. Faster-than-light - Wikipedia

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

    This may approach twice the speed of light, as in the case of two particles travelling at close to the speed of light in opposite directions with respect to the reference frame. Imagine two fast-moving particles approaching each other from opposite sides of a particle accelerator of the collider type. The closing speed would be the rate at ...

  4. 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.

  5. Causality (physics) - Wikipedia

    en.wikipedia.org/wiki/Causality_(physics)

    If a timelike interval separates the two events, this means that a signal could be sent between them at less than the speed of light. On the other hand, if signals could move faster than the speed of light, this would violate causality because it would allow a signal to be sent across spacelike intervals, which means that at least to some ...

  6. Two-body problem - Wikipedia

    en.wikipedia.org/wiki/Two-body_problem

    A two-point-particle model of such a system nearly always describes its behavior well enough to provide useful insights and predictions. A simpler "one body" model, the "central-force problem", treats one object as the immobile source of a force acting on the other. One then seeks to predict the motion of the single remaining mobile object.

  7. Brownian motion - Wikipedia

    en.wikipedia.org/wiki/Brownian_motion

    He regarded the increment of particle positions in time in a one-dimensional (x) space (with the coordinates chosen so that the origin lies at the initial position of the particle) as a random variable with some probability density function (i.e., () is the probability density for a jump of magnitude , i.e., the probability density of the ...

  8. Curved spacetime - Wikipedia

    en.wikipedia.org/wiki/Curved_spacetime

    It is not at all clear that the forces exerted on the test particle are equal. (1) Since the bottom stream is moving faster than the top, each particle in the bottom stream has a larger mass energy than a particle in the top. (2) Because of Lorentz contraction, there are more particles per unit length in the bottom stream than in the top stream.

  9. Speed of light (cellular automaton) - Wikipedia

    en.wikipedia.org/wiki/Speed_of_light_(cellular...

    This is because it is impossible to build a spaceship that can move every generation. (This is not true, though, for cellular automata in general; for instance, many light-speed spaceships exist in Seeds.) It is, however, possible for objects to travel at the speed of light if they move through a medium other than empty space.