TIME

socratus

socratus
Dec 10, 2008
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Time.
The past is fixed and clear.
It is impossible to revive the time that has gone into the past.
The future is subject to the Heisenberg uncertainty principle: ΔE Δt ≈ ħ/4π.
"Time" is created by gravity matter and energy (quantum energy).
"Time" is a relative concept.
Without gravity and quantum energy the universe has no time.
It is eternal (and infinite).
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The_Foxer

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Aug 9, 2022
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The past is fixed and clear.
This is largely held to be true but i did see an interesting discussion floating around and showing up here and there to the effect that because the arrow of time is largely based on the operation of entropy (information being released) therefore it must be statistical in nature and so there theoretically COULD be a situation where time reversed itself. Although the chances would be so slim it would take something like a dozen universe lifetimes to make it statistically likely to happen :)

And then of course there's the issue of the quantum eraser which would seem to suggest that in at least some cases the future can affect the past.
 

socratus

socratus
Dec 10, 2008
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the arrow of time is largely based on the operation of entropy (information being released)
John von Neumann said to "the father of information theory" Claude Shannon:
" Name it "entropy" then in discussions you will receive a solid advantage,
because nobody knows what "entropy" basically is "
 

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The_Foxer

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John von Neumann said to "the father of information theory" Claude Shannon:
" Name it "entropy" then in discussions you will receive a solid advantage,
because nobody knows what "entropy" basically is "
Exactly! But we're sure that's what's causing it so there you go :) LOL

Any thoughts on the quantum eraser with regards to time? That one is still a bit of a brain pickler for me. All i can say is it seems like if you could leave space/time and re-enter it at an earlier time co-ordinate you could still affect the 'past'. The laws of cause and effect would be preserved but not the rule continuity which is probably the lesser thing to break.
 

socratus

socratus
Dec 10, 2008
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"Time" is stopped:
1- at the event horizon of a black hole gravity
2- at constant speed (c) of light
3- at ''collapse' the Schrodinger (Ψ) wave - function
4- at a "point of singularity" of big bang
5- at the end of accelerating and expanding the universe
6- . . .
7- . . .
 

socratus

socratus
Dec 10, 2008
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Time stopped:
1- on the event horizon of the gravity of a black hole
2- at constant speed (c) of light in the cosmic vacuum
3- with the “collapse” of the Schrödinger wave function (Ψ)
4- at the "singularity point" of the big bang
5- at the end of the acceleration and expansion of the universe
Does existence cease when time stops?
No. The infinite/eternal Cosmic Vacuum comes into play
 

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The_Foxer

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All right - how about we tackle this one for discussion:
1- on the event horizon of the gravity of a black hole
My understanding is that isn't true. At the event horizon, time and space swap places. Right now you can move freely in space but only one direction in time. Inside a black hole no matter what direction you try to move it's in the direction of the center. So if you try to fly out of it you just move more quickly to the center of the black hole. Whereas it becomes possible to observe and move freely back and forth in time. But no matter what you do you can only move towards the center - but your time co-ordinate still changes. You're not static in time. If you were, nothing would ever reach the center of the black hole.

And in modern thinking the 'big bang' did not originate in a 'singularity'. A singularity just refers to a mathimatical issue, but it is believed that the center of the 'big bang' was not a zero size. Unfortunately all the laws of physics as we know them completely fail in the microseconds after the big bang so we can't use any math or science to calculate what the actual center would have been like. The rules of our universe simply would not have applied, we don't know what did.

I have never heard the theory that time stops if the expansion of the universe stops. Unless you're referring to the great cosmic rip theory where the universe rips itself apart and the space/time fabric is gone. I'd like to hear more about this theory if you have anything to share.