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3 votes
3 answers
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Derivation of electromagnetic stress energy tensor in curved spacetime

0 votes
2 answers
60 views

Metric tensor relations

2 votes
0 answers
17 views

Asymptotic symmetry and Conserved charges in presence of radiation

4 votes
3 answers
363 views

Does a double star system have more mass than its constituents?

3 votes
4 answers
6k views

Why does the Earth accelerate upward, according to Einstein?

1 vote
1 answer
45 views

Continuity equation for the conservation of energy from the conservation of the energy-momentum tensor

1 vote
1 answer
24 views

Why is the acceleration vector the spatial gradient of the lapse function?

0 votes
1 answer
41 views

What is the gravitational redshift inside a thin hollow sphere?

1 vote
0 answers
37 views

Decomposing velocities in the tetrad frame

2 votes
2 answers
40 views

Why apparent horizon area provides a lower bound for event horizon area?

1 vote
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38 views

Collapsing shell of null matter

1 vote
1 answer
63 views

Question about gravitational time dilatation

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+50

Does the distribution of velocity matter in the fluid approximation?

13 votes
3 answers
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What is the relevance of the Lorentz factor in general relativity?

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