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Faster-than-light (superluminal or supercausal) travel and communication are the conjectural propagation of matter or information faster than the speed of light in vacuum (c). The special theory of relativity implies that only particles with zero rest mass (i.e., photons ) may travel at the speed of light, and that nothing may travel faster.
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 ...
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 ...
With this modified setup, it can be demonstrated that even signals only slightly faster than the speed of light will result in causality violation. [44] Therefore, if causality is to be preserved, one of the consequences of special relativity is that no information signal or material object can travel faster than light in vacuum.
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The current scientific consensus is that faster-than-light communication is not possible, and to date it has not been achieved in any experiment. Superluminal communication other than possibly through wormholes is likely impossible [1] because, in a Lorentz-invariant theory, it could be used to transmit information into the past.
The universe is expanding faster than previously believed, a surprising discovery that could test part of Albert Einstein's theory of relativity. Astronomers say universe expanding faster than ...
New measurements from the Hubble telescope suggest the universe is expanding between five and nine percent faster than scientists initially thought. NASA and the ESA measured the distance to stars ...