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From: Jan Panteltje <alien@comet.invalid>
Newsgroups: sci.electronics.design
Subject: Re: how the laser happened
Date: Sun, 23 Jun 2024 05:03:34 GMT
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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:
>>>>
>>>>>There was a thread somewhere above about photon wave/particle duality.
>>>>>
>>>>>
>>>>>This is worth reading:
>>>>>
>>>>>https://www.amazon.com/How-Laser-Happened-Adventures-Scientist/dp/
>0195153766
>>>>>
>>>>>Einstein, in one of his fits of genius, predicted in around 1916 that
>>>>>under the right conditions, a photon could pass by an excited atom and
>>>>>the atom would kick in another photon, or add to the wave amplitude,
>>>>>depending on how you feel about these things. He called it stimulated
>>>>>emission. He also declared that the laws of thermodynamics made this
>>>>>effect impossible to use in practical situations.
>>>>>
>>>>>In 1951, Charles Townes invented a work-around trick and built the
>>>>>maser, a gaseous microwave oscillator. His superiors thought he was
>>>>>crazy to dispute Einstein and almost threw him out of grad school, but
>>>>>it worked.
>>>>>
>>>>>In 1960, Theodore Maiman at HRL made the first ruby laser, and Bell
>>>>>Labs soonafter made a HeNe.
>>>>>
>>>>>What's interesting is that any decent neon sign shop could have built
>>>>>a HeNe laser in 1920.
>>>>>
>>>>>HRL sounds like a very cool place, up in the hills above Malibu.
>>>>
>>>>Wasn't that where Jane Mansfield used to go out bathing?
>>>>
>>>>
>>>Keep your mind on electronics, young man.
>>>
>>>The Getty Museum is in Malibu. Go there if you can. Hearst Castle, too,
>>>up the road a bit.
>> 
>> I've been to Malibu, even did some work there...
>> Did not go to any museum, but did go to the beach.
>
>Did you see Jane? What about lobsters? Any lobsters around?

Na, but some other beatiful women I met.
Last time we went looking for edible seaweed ...