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Light in timespace

  1. May 4, 2012 #1

    I have a question about timespace. So apparently even light is affected by gravity. Is this true, or is the light merely following the curved time space (the light is moving straight where it is, but curved from my point of view because time space is curved) or are the two just ambivalent expressions of the same thing, with light being affected due to gravity due to curved timespace being just a more precise expression of light is affected by gravity.
  2. jcsd
  3. May 4, 2012 #2


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    Gold Member

    First, it's "spacetime", not "timespace". Second, it's "equivalent", not "ambivalent", and yes, they are different ways of saying the same thing.

    Matter tells spacetime how to shape itself and spacetime tells matter (and light) how to move
  4. May 4, 2012 #3

    Lights take "shortest" tracks. In non-curved space-time, the "shortest" track is the straight line. But in curved space-time, in other word when gravity works, they are not the same anymore.

    Last edited: May 4, 2012
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