Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

A Photons 2D universe?

  1. Oct 18, 2006 #1
    I was trying to envision the universe from the standpoint of a photon and it seems that based on the Lorentz contraction:
    [itex]L = L_{0}\sqrt{1-u^2/c^2}[/itex]
    since u = c this implies that, from the photons point of view, the length of the universe in the photons direction of travel contracts to zero.
    Moreover, based on time dialation
    [itex]\bar{t} = \frac{t}{\sqrt{1-u^2/c^2}}[/itex]
    since u = c any time t-bar measured by an observer will correspond to a zero time measurement by the photon.
    Does all this mean that a photon observes itself as stuck timeless and stationary on a 2D sheet?
    This just seems like a curious state of affairs and I was wondering if my reasoning was correct.
  2. jcsd
  3. Oct 18, 2006 #2
    There was an earlier discussion on this topic: https://www.physicsforums.com/showthread.php?t=107741" already. Perhaps it answers your question.
    Last edited by a moderator: Apr 22, 2017
  4. Oct 18, 2006 #3
    Last edited by a moderator: Apr 22, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook