- #1
zonde
Gold Member
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I have seen PeterDonis state that predictions of GR are expressed as contracted tensors i.e. scalars. And they are coordinate independent.
So I have a question what these scalars represent physically?
Could it be that they represent measurements of physical quantities (with tensors dual representing measurement device in certain state of motion)? Because measurements of physical quantities are coordinate independent while physical quantities are coordinate dependent.
So I have a question what these scalars represent physically?
Could it be that they represent measurements of physical quantities (with tensors dual representing measurement device in certain state of motion)? Because measurements of physical quantities are coordinate independent while physical quantities are coordinate dependent.