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 <jasonre...@gmail.com> 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?


--
You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything- l...@googlegroups.com.
Visit this group at http://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/groups/opt_out.


--
You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com.
To post to this group, send email to everything-list@googlegroups.com.
Visit this group at http://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/groups/opt_out.

http://iridia.ulb.ac.be/~marchal/



--
You received this message because you are subscribed to the Google Groups 
"Everything List" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to everything-list+unsubscr...@googlegroups.com.
To post to this group, send email to everything-list@googlegroups.com.
Visit this group at http://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/groups/opt_out.

Reply via email to