On 18 Jan 2014, at 04:55, meekerdb 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".
Interesting. This illustrates perhaps some spectrum of different
"geographies" possible, with the same physics, but different parameters.
Bruno
Brent
On 18 January 2014 11:35, Jason Resch <[email protected]> wrote:
If we get the constants, then to me that makes the apparent fine
tuning very strange. If there is only one physics, and that
includes only "these" constants, we ought to be astonished and
delighted that they allowed life at all. Or are the constants that
win also bounded by anthropic reasons?
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