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

Local landmarks

  1. Sep 20, 2012 #1
    General relativity says that nothing can go faster than the speed of light when measured against local landmarks.

    What counts as a local landmark? What is the boundary between a local and distant landmark?
     
  2. jcsd
  3. Sep 20, 2012 #2

    Mentz114

    User Avatar
    Gold Member

    The distance between such local landmarks gets smaller as the spacetime curvature around them, or between them increases. So in flat spacetime it can be any distance, but close to the sun it would be smaller. I suppose the boundary is where the nearby spacetime deviates from flatness by an amount greater than the instrumental error.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Local landmarks
  1. Local lorentz (Replies: 1)

  2. Local relativity (Replies: 4)

  3. Locally Lorentz (Replies: 40)

Loading...