Would time reverse if we were to go faster than the speed of light?

2,996

The speed limit of the universe is light, so if you were to go at the speed of light time would stop... If something were to go faster than the speed of light then it makes sense for time to go backwards.

It's at this point that I think your logic starts to fall apart.

Fundamentally, a physical theory can't answer questions about what happens when you violate the theory. Special relativity says that material objects travel at velocities less than $c$, so it can't answer questions that assume, to the contrary, that a material object travels at a velocity greater than or equal to $c$.

Another, less fundamental way of getting at this is to look at the equation for the time dilation factor

$$\gamma=\frac{1}{\sqrt{1-v^2/c^2}}.$$

For $v>c$, it doesn't give a negative result, it gives an imaginary number.

Share:
2,996

Related videos on Youtube

user537166
Author by

user537166

Updated on March 04, 2020

Comments

  • user537166
    user537166 over 3 years

    Einstein states that the fastest thing in the universe is light. He also states that velocity interacts with time (faster you go the slower time is relative to you). The speed limit of the universe is light, so if you were to go at the speed of light time would stop... If something were to go faster than the speed of light then it makes sense for time to go backwards. This would technically not be possible because if time was to go backwards then the speed of light would return to its "fastest" state hence making it not possible to go faster....Is this true fact? Or am I completely off....

    • D. Halsey
      D. Halsey over 5 years
      Are you saying that if you could exceed the speed of light, then time would run backwards, taking you back to when you were going slower than the speed of light?
    • user537166
      user537166 over 5 years
      Yes, in return this would make speed of light the limit..
  • Mohammad Javanshiry
    Mohammad Javanshiry over 5 years
    I agree with you, yet wonder why some people ridiculed me for my answer to a similar question! physics.stackexchange.com/questions/303502/…