Inflation != Multiple Universes
on
One of Many
·
· Score: 3, Interesting
From the article.
In fact, Dr. Guth said, "Inflation pretty much forces the idea of multiple universes upon us."
I read the article. Can anyone see where he justifies this statement with anything resembling logic?
I accept inflation and the 'anthropic principle' as well argued theories. Inflation=multiple universes is not (or not here).
* IBM hard drive: Made in Hungary
Not for much longer...
IBM is closing the Hungary Hard drive production.
http://news.bbc.co.uk/1/hi/business/2351787.stm
I wonder if its got anything to do with the fact that Hungary expects to become part of the EU in 2004 and IBM will not be able to pay 1st world wages...
http://news.bbc.co.uk/2/hi/world/europe/2266385.st m
The Rubber Sheet analogy is not great, it does break down a bit but it helps get the principles across without being too confusing. The guy who suggested the sheet does not have to be infinite is absolutely right.
For example, if the dots were much closer together 14 billion years ago, why didn't light travel from the farthest dot to us sooner, when the distance was shorter?
I don't really understand this. There are no furtherest dots. There are lots of dots, an infinite number. If we go ANY distance from us we will find a dot. At the moment we look 14 billion light years away and see the dot there has just emitted microwave radiation. In a billion years we will look at a dot 15 billion light years away and see it has just emitted microwave radiation. 13 billion years ago light was reaching from 1 billion light years away. ad infinitum.
I was lucky enough to attend lectures by Carlos Frenk, a great Cosmologist , in which he explained some of these concepts. I so I cannot personnally recommend a good book. Any popular science book on the subject 'Cosmology' would be suitable.
Many people think the Big Bang theory means that the universe expands like a conventional explosion from a sigular point. This is not correct.
Imagine an infinite rubber sheet covered in dots. At the beginning of the universe (or as early as we can postulate) this sheet started stretching in all directions , so the dots on it became further apart. This is similar to what happened to the universe, except in the universe it was 3 dimentional. So there is no special place where the big bang happened, it was everywhere
Since the universe was always infinite and the big bang happened everywhere on the 'sheet', as we look further away we see further back in time. This means light is always coming from every age of the universe since the big bang for us to see. The light in this case came from when the 'sheet' stretched just enough for the density of the universe to allow light to pass freely without being continually absorbed and re-emitted. This is the base microwave background radiation.
This article is saying polarisation has been detected which means some evidence of the lights last scattering event is present, so this tells us something about the universe at the point when it became opaque to light.
Slashdot Mirror
From the article.
In fact, Dr. Guth said, "Inflation pretty much forces the idea of multiple universes upon us."
I read the article. Can anyone see where he justifies this statement with anything resembling logic?
I accept inflation and the 'anthropic principle' as well argued theories. Inflation=multiple universes is not (or not here).
* IBM hard drive: Made in Hungaryt m
Not for much longer...
IBM is closing the Hungary Hard drive production.
http://news.bbc.co.uk/1/hi/business/2351787.stm
I wonder if its got anything to do with the fact that Hungary expects to become part of the EU in 2004 and IBM will not be able to pay 1st world wages...
http://news.bbc.co.uk/2/hi/world/europe/2266385.s
Found a link, this guy is more coherant than I am. ://www.astro.ucla.edu/~wright/infpoint.html
http
The Rubber Sheet analogy is not great, it does break down a bit but it helps get the principles across without being too confusing. The guy who suggested the sheet does not have to be infinite is absolutely right.
For example, if the dots were much closer together 14 billion years ago, why didn't light travel from the farthest dot to us sooner, when the distance was shorter?
I don't really understand this. There are no furtherest dots. There are lots of dots, an infinite number. If we go ANY distance from us we will find a dot. At the moment we look 14 billion light years away and see the dot there has just emitted microwave radiation. In a billion years we will look at a dot 15 billion light years away and see it has just emitted microwave radiation. 13 billion years ago light was reaching from 1 billion light years away. ad infinitum.
I was lucky enough to attend lectures by Carlos Frenk, a great Cosmologist , in which he explained some of these concepts. I so I cannot personnally recommend a good book. Any popular science book on the subject 'Cosmology' would be suitable.
Many people think the Big Bang theory means that the universe expands like a conventional explosion from a sigular point. This is not correct.
Imagine an infinite rubber sheet covered in dots. At the beginning of the universe (or as early as we can postulate) this sheet started stretching in all directions , so the dots on it became further apart. This is similar to what happened to the universe, except in the universe it was 3 dimentional. So there is no special place where the big bang happened, it was everywhere
Since the universe was always infinite and the big bang happened everywhere on the 'sheet', as we look further away we see further back in time. This means light is always coming from every age of the universe since the big bang for us to see. The light in this case came from when the 'sheet' stretched just enough for the density of the universe to allow light to pass freely without being continually absorbed and re-emitted. This is the base microwave background radiation.
This article is saying polarisation has been detected which means some evidence of the lights last scattering event is present, so this tells us something about the universe at the point when it became opaque to light.