Speed of light and time travel

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SUMMARY

The discussion centers on the implications of traveling close to the speed of light and its effects on time perception, referencing concepts from Einstein's theory of Special Relativity (SR). Participants assert that while time dilation occurs, actual time travel—especially into the future—is impossible without a specific reference point. They emphasize that traveling faster than light does not equate to time travel, as one only observes light particles rather than the events themselves. The conversation also touches on the Twin Paradox and the behavior of atomic clocks, underscoring the complexities of time measurement in relation to speed and motion.

PREREQUISITES
  • Understanding of Special Relativity (SR)
  • Familiarity with time dilation and length contraction
  • Knowledge of the Twin Paradox and its implications
  • Basic principles of atomic clock functionality
NEXT STEPS
  • Research the Hafele–Keating experiment and its relevance to time dilation
  • Study the implications of the Twin Paradox in practical scenarios
  • Explore the concept of time as a dimension in physics
  • Investigate the behavior of atomic clocks in varying gravitational fields
USEFUL FOR

Physicists, students of relativity, and anyone interested in the theoretical aspects of time travel and the effects of high-speed travel on time perception.

  • #31
motorola said:
I'm not limiting to traveling FTL. What I meant was, is it impossible to travel back in time, using whatever method at our disposal? so, all those movies about traveling back in time are... you know, just movies, impossible to implement in real world, no method exists to enable us to travel back in time.

To the absolute best of our knowledge, yes, it is impossible to travel backwards in time.
 

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