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Results tagged with general-relativity
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user 322041
A theory that describes how matter interacts dynamically with the geometry of space and time. It was first published by Einstein in 1915 and is currently used to study the structure and evolution of the universe, as well as having practical applications like GPS.
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What is the lagrangian of Einstein field equations
What is a lagrangian such that Euler-Lagrange equation (not sure if it's correct form for this case)
$$\frac{\partial \mathcal{L}}{\partial g_{\mu\nu}}=\partial_\lambda\frac{\partial \mathcal{L}}{\par …
- 925
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answer
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What are the properties of metric tensor? [duplicate]
It's frequently said that graviton has spin-2, so its wave function should have $5$ independent components. The metric tensor has $n^2=16$ components, but it obeys the following property:
\begin{equat …
- 925
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3
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Can the metric tensor always be diagonalized?
I know a few examples of metric tensors (flat, spherical, hyperbolic, Schwartzchild, Kerr, Kerr-Newman) and there's a common property between them. All of them can be expressed as
\begin{equation}
g_{ …
- 925
4
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473
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What is the stress-energy tensor in this case?
In case of static point mass we have the following stress energy tensor
$$T_{00}=m\delta^3(\vec{r})$$
And other components are zero.
What are the components of this tensor in case of moving point mass …
- 925
3
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2
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Are metrics of general relativity tested?
We tested general relativity with effects as gravitational lensing and existence of black holes (Schwarzschild metric). But there are other metrics, e.g. Kerr-Newman metric for a point mass with charg …
- 925