Big Crunch or Big Rip?

[dipayankar]

I see three scenarios for the Universe.

1) The Universe is stagnant. It neither was born nor will end. Will be like what it is.

2) The Universe will rip itself out due to the expansion

3) The Universe will collapse again into a point.

The first scenario obeys the conservation rule. However in this scenario, the Universe cannot afford too much of commotion as any sudden movement can undo the stability of the Universe.

In the second scenario, If the Universe rips itself apart and there is a change that even the quarks might be ripped apart, then we might be violating the conservation rule.

The third scene seems more likely. Just the fact that we do not know what happened before the Big Bang does not mean that there was nothing at all. So where did the matter come from? It obviously came from an existing Universe.

[Profpat]

"..The third scene seems more likely. Just the fact that we do not know what happened before the Big Bang does not mean that there was nothing at all. So where did the matter come from? It obviously came from an existing Universe."

Hi Dipayankar;

And where did that pre-existing universe get it's matter?

Best,

Pat

[austintorn@aol.com]

The quantum realm that generates particles had to have always been there. This is not not amazing since a total Nothing couldn't have done anything; thus, 'something' is the natural state. The quantum realm, while a near 'nothing' of fluctuations, is still the 'something' that is the normal state of affairs.

[dipayankar]

Well since matter cannot be created, this came from an even earlier Universe and so on till we wouldhave reached a time where due to some phenomenon matter or energy Probably at the quantum level did get created.

"..The third scene seems more likely. Just the fact that we do not know what happened before the Big Bang does not mean that there was nothing at all. So where did the matter come from? It obviously came from an existing Universe."

Hi Dipayankar;

And where did that pre-existing universe get it's matter?

Best,

Pat

[AntonioLao]

If spacetime is quantized then the various groupings of these quanta give the objective physical reality of the universe or twin multiverses.

[Profpat]

If spacetime is quantized then the various groupings of these quanta give the objective physical reality of the universe or twin multiverses.

Hi Antonio;

Isn't both time and space quantized as Planck time and Planck length, anything shorter or smaller just doesn't exist, by definition and reality. So wouldn't space/time be quantized also.

Isn't everything in our universe based on quanta. I'm not sure about the spectrum that might be continuous? Do you know?

Best,

Pat

[dipayankar]

So would a Magnetic field be quantised as well?

Hi Antonio;

Isn't both time and space quantized as Planck time and Planck length, anything shorter or smaller just doesn't exist, by definition and reality. So wouldn't space/time be quantized also.

Isn't everything in our universe based on quanta. I'm not sure about the spectrum that might be continuous? Do you know?

Best,

Pat

[Profpat]

So would a Magnetic field be quantised as well?

... or using the technical term for light, electromagnetic radiation. ... energies, the radiation produced is continuous, and not at the discreet energies ...
imagine.gsfc.nasa.gov/docs/science/how_l2/spectra.html

Stanford SOLAR Center -- Ask A Solar Physicist FAQs - Answer


Magnetic fields are continuous, not discreet. ... At Earth the magnetic field is fairly continuous too, so again it doesn't really ...
solar-center.stanford.edu/FAQ/Qemlinespacing.html - Cached

[dipayankar]

Does it really matter that magnetic field is continuous and EM fields are quantized?

... or using the technical term for light, electromagnetic radiation. ... energies, the radiation produced is continuous, and not at the discreet energies ...
imagine.gsfc.nasa.gov/docs/science/how_l2/spectra.html

Stanford SOLAR Center -- Ask A Solar Physicist FAQs - Answer


Magnetic fields are continuous, not discreet. ... At Earth the magnetic field is fairly continuous too, so again it doesn't really ...
solar-center.stanford.edu/FAQ/Qemlinespacing.html - Cached

[Profpat]

Does it really matter that magnetic field is continuous and EM fields are quantized?

Actually I think both are continuous Dip. I don't think it matters, it is what it is. The real question that Antonio suggested, is the space/time field continuous or discreet? That I am having a more difficult time researching the answer.

Best,

Pat