Lambda interacts with gravity to give expantion

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    Gravity Lambda
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Discussion Overview

The discussion revolves around the interaction of lambda (Λ) with gravity and its role in cosmic expansion. Participants explore the mechanics behind this interaction, questioning the implications of energy density and pressure in the context of general relativity.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants express confusion about how lambda interacts with gravity to produce expansion, seeking a deeper understanding of the mechanics involved.
  • One participant highlights the puzzling nature of how energy density and pressure can curve space, referencing the 1915 equations of general relativity.
  • Another participant notes that the pressure inside the sun contributes to its gravitational attraction, suggesting a complex relationship between pressure and gravity.
  • There is a suggestion that the accelerating expansion of the universe might indicate a breakdown of general relativity at large distances, introducing a speculative idea about the limitations of classical theories.
  • A later post introduces a humorous remark, indicating a mix of fascination and frustration with the topic, but does not contribute to the technical discussion.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the mechanics of lambda's interaction with gravity. Multiple competing views and uncertainties remain regarding the implications of energy density and pressure in the context of general relativity.

Contextual Notes

Participants express limitations in their understanding of the 1915 equations and the nature of space and time, indicating unresolved questions and assumptions about the relationship between energy, pressure, and gravitational effects.

wolram
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it has been stated that lambda interacts with gravity to
give expansion,can anyone give the" mechanics" of this
interaction?
 
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Originally posted by wolram
it has been stated that lambda interacts with gravity to
give expansion,can anyone give the" mechanics" of this
interaction?

I can not wolram.
I find it puzzling that the concentraton of energy and the pressure in a region should curve the space around it

this is what this 1915 equation says

it says, in words

curvature = (some constant times) energy density and pressure


if it was only energy density that would be mysterious enough but have you registered that it is, to a small extent, the pressure inside the core of the sun that makes the sun attractive to the Earth and holds us in orbit

this 1915 equation is still on our plate, we don't seem to have assimiliated it yet, or what space is or time is either

Lambda is just some energy that has some (negative) pressure associated with it. It gets into the equation pretty much like other energy and pressure----the premier puzzle is why energy and pressure work at all to curve space
 
thankyou MARCUS.

well if you don't have the answer its no use looking

any more.
:smile:
 
Originally posted by wolram
thankyou MARCUS.

well if you don't have the answer its no use looking

any more.
:smile:

probably an example of the renowned warwickshire humour
that americans do not understand:wink:

it seems like the most interesting question around
and I suspect you agree
 
Originally posted by wolram
it has been stated that lambda interacts with gravity to
give expansion,can anyone give the" mechanics" of this
interaction?

Maybe the accelerating expansion is a result of the breakdown at large distances instead of small of GR as a classical theory. (And thus my quota of one crazy idea a day is filled).
 
facinating and hateful, i would love to kill
it and have it with mint sauce.
 

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