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Newtonian space in modern physics

  1. Jul 30, 2015 #1
    I asked one time on this forum about bending space. If I take a paperback book and understand it as space instead of matter, and then bend it, it seems that the bent space moves into other space and that there is space from which it came. Now the idea didn't make any sense to me. Someone clarified for me that in modern physics bending space is an "intrinsic bending" or "curvature". That made a lot of sense to me. However, does modern science use the Newtonian idea of external space? Or has that idea been left in to history? Thanks. The history of physics is very interesting for me.
     
  2. jcsd
  3. Jul 30, 2015 #2
    The newtonian concepts of absolute space and time have been abandoned in favour of Relativity. That doesn't mean that newtonian concepts are not useful in certain circumstances, they can still be used for many calculations within their domain of applicability.
     
  4. Jul 30, 2015 #3
    Newtonian concepts still work fine for projects such as say building a bridge.
    Using relativity to do something like that would result in a lot of unnecessary calculating which would make no difference to the bridge.
     
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