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B Spacetime, quantum field, and aether

  1. Nov 23, 2016 #1
    Hey guys,

    What is the difference between spacetime, quantum field and aether? For a beginner, maybe these terms seems similar because these terms indicating "something" that which has no shape. But what are the differences exactly between these?
     
  2. jcsd
  3. Nov 23, 2016 #2

    hilbert2

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    Spacetime is the set of all points that have t, x, y and z coordinates. A field is a function that assigns some (scalar, tensor, spinor..) value for every spacetime point. Aether is a hypothetical material medium that fills the whole universe, but almost no one believes in it anymore because we now know that light doesn't need any substance to propagate in.
     
  4. Nov 23, 2016 #3

    Vanadium 50

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    You can't start physics in the middle. If you want to understand advanced topics, you need to understand things like force, power and how they differ first.
     
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