- #1
kleinwolf
- 295
- 0
I put together two questions :
a) suppose there is a point mass with mass M..if it is moving, then from a certain oberver, the total energy is higher, via E=Mc^2...hence, following the generaly relativity qualitatively, where the energy density defines the curvature, the gravitation should be different ?
b) let's take two coordinate systems, linked by a transformation, how are the metric obtained as solution linked together : [tex] x^\mu=f^\mu(x'^\nu)[/tex] how are the [tex]g_{\mu\nu}[/tex] linked to the [tex]g'_{\mu\nu}[/tex]...since the tensor is symmetric, there are only 6 degree of freedom, and hence there should exist 6 degree of functional degree of freedom for the coordinates. Those should hence describe the same space-time. (e.g. Shwarzschild(singular)<->Kruskal(non singular))..Or the question can be stated as : how to know that 2 metrics cannot be obtained by a change of coordinates ?
a) suppose there is a point mass with mass M..if it is moving, then from a certain oberver, the total energy is higher, via E=Mc^2...hence, following the generaly relativity qualitatively, where the energy density defines the curvature, the gravitation should be different ?
b) let's take two coordinate systems, linked by a transformation, how are the metric obtained as solution linked together : [tex] x^\mu=f^\mu(x'^\nu)[/tex] how are the [tex]g_{\mu\nu}[/tex] linked to the [tex]g'_{\mu\nu}[/tex]...since the tensor is symmetric, there are only 6 degree of freedom, and hence there should exist 6 degree of functional degree of freedom for the coordinates. Those should hence describe the same space-time. (e.g. Shwarzschild(singular)<->Kruskal(non singular))..Or the question can be stated as : how to know that 2 metrics cannot be obtained by a change of coordinates ?