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NNTP-Posting-Date: Sun, 23 Jun 2024 16:45:06 +0000
From: john larkin <jl@650pot.com>
Newsgroups: sci.electronics.design
Subject: Re: how the laser happened
Date: Sun, 23 Jun 2024 09:45:07 -0700
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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:
>>>>>>
>>>>>>>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 ...
>
>Argh! Never mind. I believe Jane had terrible problems with lobsters when 
>she went out bathing in Malibu. But you don't know anything about that, 
>clearly. It obviously wasn't publicised in Holland.

This thread is about lasers, not lobsters.