On 1/17/2014 8:35 PM, Jason Resch wrote:
On Fri, Jan 17, 2014 at 9:55 PM, meekerdb <[email protected]
<mailto:[email protected]>> wrote:
On 1/17/2014 3:13 PM, LizR wrote:
Indeed it would be very strange, perhaps verging on miraculous. I believe
just the
nuclear resonance discovered by Hoyle alone is already incredibly fine
tuned, after
which we have the amazing properties of carbon and water, and the
cosmological
flatness and god (ahem) knows what else.
Hoyle predicted that there had to be an excited state of C^12 at 7.7Mev in
order to
produce the observed abundance of carbon. It was observed at 7.656Mev. But
it was
shown by Livio, M. et al. (1989). "The Anthropic Significance of the
Existence of an
Excited State of C12." Nature 340, 281-284, that essentially the same
amount would
be produced by a resonance between 7.596Mev and 7.716Mev. Even more would
be
produced with a lower resonance down to 7.3367Mev, the difference between
Be^8 +
He^4 and C^12. And carbon sufficient for life would be produced up to 7.933Mev.
Whether an 8% range is fine-tuned or not, I don't think it's "incredibly fine-tuned".
It becomes incredible when one considers the 10 - 20 other parameters that similarly had
to be within a narrow range.
What are they? I've seen a lot of questionable claims of 'fine-tuning'. One problem is
that 'narrow range' is ill defined. If there is no natural limit on a variable, then any
range is 'narrow' relative to _+_inf.
Brent
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