Sujet : Re: how the laser happened
De : bill.sloman (at) *nospam* ieee.org (Bill Sloman)
Groupes : sci.electronics.designDate : 26. Jun 2024, 15:53:24
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <v5h6gp$25dg9$2@dont-email.me>
References : 1 2 3 4 5 6 7 8 9 10 11 12 13 14
User-Agent : Mozilla Thunderbird
On 25/06/2024 6:13 am, john larkin wrote:
On Mon, 24 Jun 2024 16:47:57 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
john larkin <jl@650pot.com> wrote:
On Mon, 24 Jun 2024 00:22:06 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
>
john larkin <jl@650pot.com> wrote:
On Sun, 23 Jun 2024 22:09:42 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
>
john larkin <jl@650pot.com> wrote:
On Sun, 23 Jun 2024 18:08:52 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
>
john larkin <jl@650pot.com> wrote:
On Sun, 23 Jun 2024 16:39:56 -0000 (UTC), Cursitor Doom
<cd999666@notformail.com> wrote:
>
On Sun, 23 Jun 2024 05:03:34 GMT, Jan Panteltje wrote:
>
On a sunny day (Sat, 22 Jun 2024 17:23:40 -0000 (UTC)) it happened
Cursitor Doom <cd999666@notformail.com> wrote in
<v571as$3rs0j$2@dont-email.me>:
>
On Sat, 22 Jun 2024 06:19:49 GMT, Jan Panteltje wrote:
>
On a sunny day (Fri, 21 Jun 2024 11:32:56 -0700) it happened john
larkin <jl@650pot.com> wrote in
<1ghb7jt3882078r19n6jjgtirv25q27805@4ax.com>:
>
On Fri, 21 Jun 2024 17:56:36 +0100, Cursitor Doom <cd@notformail.com>
wrote:
>
On Fri, 21 Jun 2024 06:05:21 -0700, john larkin <jl@650pot.com>
wrote:
<snip>
Living things can certainly pump up molecular energy states to make
visible light. Why couldn't they produce the population inversions
that enable stimulated emission and optical gain?
Why wouldn't they?
Evolution proceeds by making random changes. The changes that survive have all had to work better than the system that preceded them.
Creatures that fluoresce use the light they generate to their advantage, but it costs them energy to create it. Creating a population inversion costs a lot more energy than exciting a few molecules, and it isn't likely to do anything useful when it crops up at random.
It's like error-detecting and correcting codes - our genome should exploit them, but doesn't, because getting half-way there doesn't generate an advantage.
-- Bill Sloman, Sydney-- This email has been checked for viruses by Norton antivirus software.www.norton.com
how the laser happened
Re: how the laser happened