To Help You Understand
Originally posted by Uniceft17
I really wish I could understand what this is all about, could someone explain this to me in simple way, is it possible? Yes, I am oviously ignorant
on this subject. :/
Sorry this has been so long coming.
There have been some amazing ideas tossed about in this thread. Without in any way trying to poop the party, I'd like to contribute a few words that
may help you understand the subject better. This, in turn, will help you evaluate some of the ideas being discussed.
I'll keep it short. Here's a good place to start:
Originally posted by jkrog08
This is going to throw some major kinks into our current understandings of quantum and macro realms.
I don't think so. The idea of 'stretched' neutrinos fits in well with the current worldview of physicists and cosmologists.
Hot, Fast and Nasty
To understand this, let's go back to those moments just after the Singularity began expanding, the moments, if you like, in which the infant universe
first drew breath. Nearly all the matter in existence has just reacted with all the antimatter in the mother of all explosions. A bit of matter is
left over - all the matter there will ever be in the universe from now on.
The universe is still tiny: You can imagine it the size of a grapefruit, the size of a beach ball or the size of a planet. It's expanding so fast
that all these comparisons are well in the ballpark.
Incredible, unimaginable energies are flying around inside this small space. Matter as we know it cannot exist - it would be ripped apart before it
could form. Never mind atoms and molecules; even protons and neutrons can't exist yet. What can
and does exist are the so-called fundamental
particles: photons, neutrinos*, electrons and quarks.
But this grapefruit-beachball-planet-sized universe is, at this time, expanding faster than light
- at least, faster than light travels through
the universe today. And as it expands, its contents are expanding with it.
The expansion is accompanied, as you would expect, by cooling. And as the universe cools, quarks combine to form protons and neutrons, and these
combine with electrons to form atoms. Atoms clump together under the influence of gravity. The local
expansion of space is halted, though on a
cosmic scale, space continues to expand. Solid, clumpy matter, once formed, doesn't expand and neither does the space around it.
The photons, meanwhile, are 'expanding' away along with space itself. But light always travels through space at the same speed. It can't speed up
or slow down. Instead, it loses energy by redshifting, its frequency falling as the space it is crossing expands. You can think of a redshifted photon
as a stretched photon. The photons we're looking at, the ones that were around at the birth of the universe, are still around - but they've been
redshifted down from gamma frequencies to longwave radio frequencies. That's how far they've been stretched.
A Long Story
So far, this is all pretty straightforward stuff. Now let's think about neutrinos.
Neutrinos have barely any mass. They are created by beta decay, but once created they barely interact with other particles. Gravity scarcely affects
them; electromagnetic energy has no effect on them and neither do the strong or weak forces**. They go their own merry way, unaffected by anything the
universe can throw at them.
With one exception: the expansion of space itself.
Very simply, the space through which those primordial neutrinos travel has been stretching ever since creation, and the neutrinos - without any
physical property that would oppose this expansion*** - have just kept stretching along with it. As a result, they're now stretched across the
So that's what we're talking about here. It has nothing to do with strings, branes or quantum entanglement. It's a whole lot simpler than that.
Needn't stop us speculating, though.
* * *
Well, there you have it: my two cents' worth. I hope it makes sense and helps inform your speculations. But neutrons are ghost particles as far as
beings like us, beings made of matter, are concerned. We have our work cut out just detecting them, so I doubt we'll be using them as an
intergalactic telegraph any time soon. It'll be a while before the world's patent authorities are troubled by applications from would-be-inventors
of the ansible.
Scamandrius out. As usual, I shall genuinely welcome correction or discussion on this stuff from anyone who knows better than I.
, neutrinos do come from the sun, but it is not and never was the only source.
**As far as I know.
***Such as an invariant velocity or the ability to halt local metric expansion.