All Questions
8
questions
0
votes
1
answer
51
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Equivalent theories of general relativity and graviton spin
Are there equivalent theories of general relativity that assume a graviton has a spin-1?
- 31
3
votes
1
answer
199
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Will the ever accelerating space expansion (like at the level of inflation) eventually break causality?
I have read this question:
requires that "for an action at one point to have an influence at another point, something in the space between the points, such as a field, must mediate the action&...
- 29k
0
votes
2
answers
118
views
Does the mass of a moving object in empty space with a constant velocity change within its own frame of reference from its rest mass?
I believe that a constant velocity moving object in empty space within it own frame of reference retains its rest mass as long as it is moving at constant velocity and an effective mass increase ...
- 4,170
5
votes
1
answer
342
views
Why did Dirac say that atomic time is different from relativistic time, and that gravity is becoming weaker? What is the relation between the two?
In this gem of an interview in 1982 with Friedrich Hund, Dirac says at 09:17 that there is some theoretical basis and observational evidence that atomic time and distances are different from ...
- 1,421
1
vote
3
answers
202
views
What is the result that that differs by many orders of magnitude between QM and GR? [duplicate]
It is well known that QM and GR are deemed incompatible due to a discrepancy in some calculations which I have read can differ by large magnitudes. What are these calculations to which people are ...
- 145
-1
votes
1
answer
57
views
What does the photon feel when it hits an asteroid on its path to earth [duplicate]
If a photon was approaching earth, after 1 minute(from earths reference frame) an asteroid comes on the photons path. And it hits the asteroid, but from the photons reference frame time doesn't pass ...
2
votes
0
answers
131
views
Elementary particle (electron) and non-elementary (proton) spagettification
I understand that spagettification means the vertical stretching and horizontal compression of objects into long thin shapes in a non-homogenous gravitational field, it is caused by tidal forces.
Now ...
- 29k
7
votes
1
answer
307
views
Are there any additional fundamentals of physics in addition to space-time, energy, mass, and charge?
What do you consider the fundamental quantities in physics to be? By fundamentals, I mean quantities that cannot be described by a combination of other quantities. Fundamentals are things that just ...
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