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by Ciro Santilli (@cirosantilli, 37)

Faster-than-light implies time travel

 ... Subatomic particle Elementary particle Photon Light Speed of light Faster-than-light
 0 By others on same topic  0 Discussions  Updated 2025-05-23  +Created 1970-01-01  See my version
Figure 1.
Spacetime diagram illustrating how faster-than-light travel implies time travel
. Legend an explanation are shown in this answer.
Bibliography:
  • physics.stackexchange.com/questions/13001/does-superluminal-travel-imply-travelling-back-in-time/615079#615079
  • physics.stackexchange.com/questions/574395/why-would-ftl-imply-time-travel
  • physics.stackexchange.com/questions/516767/how-does-a-tachyonic-antitelephone-work
  • www.physicsmatt.com/blog/2016/8/25/why-ftl-implies-time-travel shows the causality violation on a Spacetime diagram

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  1. Faster-than-light
  2. Speed of light
  3. Light
  4. Photon
  5. Elementary particle
  6. Subatomic particle
  7. Standard Model
  8. Particle physics
  9. Physics
  10. Natural science
  11. Science
  12.  Home

 Incoming links (1)

  • Causality in quantum mechanics

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