All Questions
12
questions
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Einstein's equation of gravitation field [duplicate]
I'm looking for the reason why there is the number eight $8$ at the r.h.s. of EI:
$$R_{\mu\nu}-\frac{1}{2}Rg_{\mu\nu}=\frac{8\pi G}{c^2}T_{\mu\nu}.$$
My attempt was to take the limit of this equation ...
- 255
1
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0
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86
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How does a curvature in time equate to Newtonian gravity? [duplicate]
I often read that a curvature in time (the rate at which clocks tick) near a massive object, is considered to be the source of Newtonian gravity.
This got me wondering, does General Relativity use the ...
-6
votes
1
answer
396
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Why use the Minkowski metric in general relativity? [closed]
We can represent Newton's free fall as a curved trajectory in 4-dimensional spacetime. Time is on the ordinate and space on the abscissa.
By adding an initial speed to the object, we can reproduce ...
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-5
votes
1
answer
668
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How can two objects with the same mass attract each other?
According to Einstein's theory of GR, two objects with the same mass won't atract each other, Why i'm saying this? The atraction according to GR happens because the objects with less curvature of ...
user319766
1
vote
1
answer
358
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Curvature in the Newtonian Gravity
Let me give a little bit of insight. I was trying to calculate the geodesic of different curves when I realised some relation (if I can call it like that), between General Relativity and Newton's Law ...
- 1,525
3
votes
1
answer
208
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Attemp to encode newtonian gravitation as 3-dimensional space curvature
In lecture 9 of this series of lectures, Professor Frederic Schuller (around time 24:00) is trying to answer the question about the possibility to interpret newtonian gravity as a three-dimensional ...
- 1,290
6
votes
9
answers
3k
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According to general relativity planets and Sun bend the spacetime (explaining gravity), but does this hold true for smaller objects?
According to general relativity planets and the sun bend spacetime, and that is the explanation of gravity. However, does this hold true for smaller objects, like toys, pens, etc.? Do they also bend ...
- 119
3
votes
3
answers
641
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How is Gravity created in opposite to centrifugal force? [closed]
Wikipedia points out that Gravity is:
most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915) which describes gravity not as a force, but as a consequence ...
- 139
2
votes
4
answers
646
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How can one understand with an example that Newton's law(s) fail in a curved space?
Is it true that Newton's law is not valid in curved spaces? If yes, how can I understand it and explain to a high school student preferably with an example? I tried to think about the motion of a ...
- 11.7k
2
votes
2
answers
144
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Can General Relativity be "translated" to a language of forces in the analogous way that Newtonian gravity can be formulated in geometric terms?
I know from "Gravitation" of Misner, Thorne and Wheeler(MTW) that Newtonian gravity can be formulated in a geometric language. Can we do the reverse for General Relativity? That is, could General ...
- 7,720
3
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1
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579
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A few questions about Einstein's theory involving gravity
After watching a documentary about Einstein's theory of relativity, my mind was busy trying to comprehend how space bends when space is void and not made of matter. And additionally, does his theory ...
- 33
2
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3
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293
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Newtonian space
Often, gravity in relativity is depicted as and the orbit of a celestial body around another body like a ball spinning in a deep bowl, which is said to be space influenced by the presence of a large ...
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