How Does Rotation Affect Gravity and Relativity Perception?

  • Context: Graduate 
  • Thread starter Thread starter uncommonsense
  • Start date Start date
  • Tags Tags
    Gravity Rotation
Click For Summary

Discussion Overview

The discussion revolves around the effects of rotation on gravity and the perception of relativity, exploring concepts related to time dilation, centrifugal force, and energy distribution in rotating and non-rotating spheres. Participants examine how these ideas might apply to different frames of reference, particularly in the context of a planet like Earth.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant suggests that gravity is not fully understood compared to velocity, distance, and time differences in relative frames, questioning the necessity of a change in distance for relativity effects.
  • The same participant proposes a scenario involving a rotating Earth and two rocks, one on the surface and one buried, to illustrate differences in perceived motion and time dilation.
  • Another participant argues that time dilation would occur regardless of rotation, implying that the initial arguments may not hold without considering this point.
  • Further discussion includes the idea that in a rotating sphere, atoms might experience different effects compared to a non-rotating sphere, but one participant challenges the relevance of rotation in the behavior of atoms.
  • Concerns are raised about the implications of atoms seeing each other's clocks moving slower and how this might relate to energy distribution within the mass.
  • A suggestion is made to consider a different forum for discussing personal theories more freely, indicating a potential disconnect in the discussion's focus.

Areas of Agreement / Disagreement

Participants express differing views on the relevance of rotation to the behavior of atoms and the implications for energy distribution. There is no consensus on the validity of the proposed models or the interpretations of time dilation effects.

Contextual Notes

Participants explore various assumptions about frames of reference, the effects of rotation, and the nature of energy distribution, but these ideas remain speculative and are not fully resolved within the discussion.

uncommonsense
Messages
2
Reaction score
0
I do not have a great math background. However, the more I read about Relativity, the more it appears intuitive. If I understand correctly, gravity is not yet fully understood, at least not as well as is velocity, distance and time differences in different relative frames.

Any example I have ever seen explaining why a clock (matter) experiences v t and d differently as viewed by another frame, has used examples of the clock moving at some speed compared to the other clock, in whatever direction: there is always a change in distance between the two somewhere in the example, and a difference in speed(v). I guess that's why they are in different inertial frames. So it appears relativity differences in v t & d require a change in distance between the compared objects?

Does it make sense then if you imagine a large planet (say the Earth) spinning on its axis, and imagine a rock sitting on the surface at the equator. Now imagine you could burry a rock of equal mass at a location* half way down between your surface rock and the exact center of the earth. As the Earth rotates, the surface rock is moving thru space faster than the burried rock from the burried rocks perspective, but there is no change in the distance between the two rocks.

However, are not the two rocks experiencing centrifugal force a little differently than one another? Are they part of the same inertial frame?

Also, From The burried rock's perspectice:Is not the surface rock moving faster and further thru space? Would the surface rock's clock move slower? Would its mass increase per E=mc2)? In a rotating sphere, Is there more and more energy with each layer? (a layer being all rocks an equal distance from the center, along th equater.

Can you consider each "layer" of a rotating sphere as described above its own separate inertial frame?

Using these ideas, If you imagine as described above that there is more and more mass (energy) in each layer away from the center of a rotating sphere, then as a whole, is the sphere in a state of energy imbalance? Would the energy want to "equalize" towards the center, thereby "pushing" all the rocks (Atoms?)together? If this "pushing" force were greater than was needed to keep the sphere in an energy equalibrium, would the force "look" for other mass(energy) to bring (pull?push) into the center? If light (energy) passed by would this force try to "grab" it? If Another planet came too close? The Moon?


Even without rotation, is there more energy at the surface of a body of mass than in the center, if you apply these ideas to each individual atom as being a frame of referance, rather than the layers above. If you start at the center of any object, there will be more and more atoms at each spherically measured distance point, or layer, (measured in all directions - measured points of each layer would look like the shell of a sphere, each layer one atom bigger in an outwrd direction) away from that center. I think this model would lead to the same as above.

Any thoughts. Am i an iiot?
 
Physics news on Phys.org
If Earth were not rotating, it would experience just as much time dilation. You know this and allude to it in your final paragraph, but I don't see how you address it. It pretty much negates the first 7 paragraphs.
 
I meant to compare the results in the last paragraph the first 7 by saying even without rotation, same results per first 7 paragraph model. With rotation model, layers simply moved thru more space per the rotation.

In non-spining idea, i imagined every single atom viewing another next to it from a different frame. if atoms continually move around, then they will see each others clocks moving slower as compared to their own, and since there are more atoms to be seen (by fewer atoms toward center) as moving with slower clocks out at the surface of the mass, this would create the unequal distibution of energy.
 
uncommonsense said:
I meant to compare the results in the last paragraph the first 7 by saying even without rotation, same results per first 7 paragraph model. With rotation model, layers simply moved thru more space per the rotation.

1] In a rotating sphere, atoms do X.
2] In a non-rotating sphere, atoms do the very same X.
Therefore, rotation is not a factor at all in whether or not atoms do X.

Caveat: I am not suggesting that any of this is true, or even makes sense, so far I'm just examining the internal logic of your argument.


uncommonsense said:
In non-spining idea, i imagined every single atom viewing another next to it from a different frame. if atoms continually move around, then they will see each others clocks moving slower as compared to their own,
Are you suggesting the atoms in the Earth are moving with respect to each other at relativistic speeds?
uncommonsense said:
and since there are more atoms to be seen (by fewer atoms toward center) as moving with slower clocks out at the surface of the mass, this would create the unequal distibution of energy.
1] What does 'atoms seeing each other' have to do with "creating" anything?
2] ...let alone 'an unequal distibution of energy'? Whatever that is.
 
May I suggest a website where you can discuss perosnal theories more openly? "Bad Astronomy / Universe Today." (Ignore the title, it's a carry-over.)
 

Similar threads

  • · Replies 18 ·
Replies
18
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 42 ·
2
Replies
42
Views
3K
  • · Replies 14 ·
Replies
14
Views
1K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 21 ·
Replies
21
Views
3K
  • · Replies 32 ·
2
Replies
32
Views
3K
Replies
11
Views
2K
  • · Replies 46 ·
2
Replies
46
Views
4K