There is a lot of discussion about the BB. I once held the opinion that BBT seemed OK down to a few millionths of a second, but broke down as one approached t = 0. Now I am beginning to wonder whether all these non-existent "infinite" temperatures and pressures are simply the result of semantic errors. Are they just letters thrown together into words with little relevance to reality. Many will know my support of General Semantics (Korzybski), the touchstone of which is "The map is not the territory". It is easy to play around with words, and believe that it means anything at all.
So I have some questions, on which I would appreciate feedback:
1. Can you have expansion of space which does not go along with expansion of material objects?
As I understand it, "space" but not the material objects in it, is expanding.
We come back to the aether. Is there something "real", as was supposed the aether, or is there any co-ordinate system devoid of physical reality? If the objects expanded with the space containing them, how would you recognise that there was any expansion? If your ruler expands at the same rate as what you are measuring, how can you detect expansion? Is there something akin to an aether, or not?
2. There is, IMHO, a lot of confusion about terms. If the Universe is all there is, how can you have universes?
OK, I can understand observed universes, as being those portions observable of the Universe by an individual observer, but these are obviously subjective. So what is a multiverse? And, more importantly, perhaps, what are multiverses? These words are being used.
Using undefined and grossly misunderstood terminology is not productive of sane discussion.
3. Is it seriously being suggested that the entropy at t = 0 is zero? I am not assuming (though many seem to) that entropy can only increase, although it does seem to be the case 'here and now'. Is our current world more random than a total mix of 'everything' at 'infinite' temperature and pressure? Are we not using meaningless words in relation to a 'real' Universe, and expecting sane answers?
There are more questions, but that will do for a start.'
Cat
So I have some questions, on which I would appreciate feedback:
1. Can you have expansion of space which does not go along with expansion of material objects?
As I understand it, "space" but not the material objects in it, is expanding.
We come back to the aether. Is there something "real", as was supposed the aether, or is there any co-ordinate system devoid of physical reality? If the objects expanded with the space containing them, how would you recognise that there was any expansion? If your ruler expands at the same rate as what you are measuring, how can you detect expansion? Is there something akin to an aether, or not?
2. There is, IMHO, a lot of confusion about terms. If the Universe is all there is, how can you have universes?
OK, I can understand observed universes, as being those portions observable of the Universe by an individual observer, but these are obviously subjective. So what is a multiverse? And, more importantly, perhaps, what are multiverses? These words are being used.
Using undefined and grossly misunderstood terminology is not productive of sane discussion.
3. Is it seriously being suggested that the entropy at t = 0 is zero? I am not assuming (though many seem to) that entropy can only increase, although it does seem to be the case 'here and now'. Is our current world more random than a total mix of 'everything' at 'infinite' temperature and pressure? Are we not using meaningless words in relation to a 'real' Universe, and expecting sane answers?
There are more questions, but that will do for a start.'
Cat