Received: by alpheratz.cpm.aca.mmu.ac.uk id HAA02968 (8.6.9/5.3[ref pg@gmsl.co.uk] for cpm.aca.mmu.ac.uk from fmb-majordomo@mmu.ac.uk); Mon, 28 Jan 2002 07:01:30 GMT Date: Sun, 27 Jan 2002 22:57:12 -0800 Message-Id: <200201280657.g0S6vCi23385@mail21.bigmailbox.com> Content-Type: text/plain Content-Disposition: inline Content-Transfer-Encoding: binary X-Mailer: MIME-tools 4.104 (Entity 4.116) X-Originating-Ip: [65.80.160.154] From: "Joe Dees" <joedees@addall.com> To: memetics@mmu.ac.uk Subject: RE: Light and the Big Bang Sender: fmb-majordomo@mmu.ac.uk Precedence: bulk Reply-To: memetics@mmu.ac.uk('binary' encoding is not supported, stored as-is)
> "Dace" <edace@earthlink.net> <memetics@mmu.ac.uk> Light and the Big BangDate: Sun, 27 Jan 2002 12:52:43 -0800
>Reply-To: memetics@mmu.ac.uk
>
>
>> Hi Dace -
>>
>> >It's common knowledge among physicists, astronomers,
>> >cosmologists, etc., that light didn't appear until 300,00 years after
>> >the big bang (though I recently saw this figure upped to 400,000,
>> >unfortunately without any explanation for the revised figure).
>>
>> The cosmic background radiation that we can detect, yes, began at
>> that time. It is a space-time boundary caused by the scattering
>> qualities of photons and the nature of the early universe. It's not that
>> light (photons) was not there, but that it was undetectable.
>
>Wade,
>
>You're reducing light to photons. This is not quite correct. Photons only
>constitute light when they're allowed to travel freely across space in
>waves. When photons and electrons are bound together in a single substance,
>there can be neither light nor anything for the light to illuminate.
>
>> http://map.gsfc.nasa.gov/m_uni/uni_101bbtest3.html
>>
>> The behavior of CMB photons moving through the early universe is
>> analogous to the propagation of optical light through the Earth's
>> atmosphere. Water droplets in a cloud are very effective at scattering
>> light, while optical light moves freely through clear air. Thus, on a
>> cloudy day, we can look through the air out towards the clouds, but can
>> not see through the opaque clouds.
>
>The sun casts light onto the clouds, at which point the light is scattered.
>In the early universe, on the other hand, there was never any light in the
>first place that could then be scattered. Right from the get-go, photons
>were bound up with electrons and unable to form into light rays.
>
>What this illustrates is that there are two kinds of darkness. The darkness
>we're accustomed to is simply the absence of light. The darkness of the
>early universe is the creation of light. This is why the interior of the
>sun is dark. Light cannot exist in the process of its own generation.
>
The universe cooled enough to permit light or other detectable radiant forms to exist long before it cooled enough to allow matter to coalesce.
>
>
>Ted
>
>
>
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>This was distributed via the memetics list associated with the
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This was distributed via the memetics list associated with the
Journal of Memetics - Evolutionary Models of Information Transmission
For information about the journal and the list (e.g. unsubscribing)
see: http://www.cpm.mmu.ac.uk/jom-emit
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