Spectral analysis

>
> Ah .... language language language.  It's the
> source of many problems.
>

It is even more cumbersome if you are (like me) not a native English 
speaker...sometimes I say something and later on I notice that everyone has 
understood something else :-) 

On Wed, 02 May 2007 11:11:09 -0400, Jerry Avins <jya@ieee.org> wrote:

>Rick Lyons wrote:
>
>   ...
>
>> Ah .... language language language.  It's the 
>> source of many problems.
>
>Amen, Rick. Even the meaning of "rectangular window" depends on context.
>
>Do you know about using a rectangular (actually, square) window in a 
>spectroscope? Like any other optical instrument, the resolution of a 
>spectroscope depends on its objective lens diameter; the bigger the 
>lens, the finer the observable detail. Stopping a spectroscope with a 
>square aperture oriented with the diagonal parallel to the slit reduces 
>the sidelobe that would result from the first bright ring of the Airy 
>disk, making it more likely to see a dim line near a bright one.
>
>These things aren't new. The square stop was in use before I was born.
>
>Jerry

Hi Jer,
  I've heard of "Airy disks" associated with circular 
mirrors and cicular lenses in telescopes,
but I'm unfamiliar with spectroscopy.
Diagonal orientation, huh?  Sounds interesting.
Isn't nature full of surprises?

See Ya',
[-Rick-]

On Wed, 2 May 2007 19:00:34 +0200, "NewLine"
<umts_remove_this_and_this@skynet.be> wrote:

>
>>
>> Ah .... language language language.  It's the
>> source of many problems.
>>
>
>It is even more cumbersome if you are (like me) not a native English 
>speaker...sometimes I say something and later on I notice that everyone has 
>understood something else :-) 

Hi Newline,
   Ha ha.  I imagine everyone who's ever 
posted here has had that problem at one 
time or another.

See Ya',
[-Rick-]

On Wed, 2 May 2007 19:00:34 +0200, "NewLine"
<umts_remove_this_and_this@skynet.be> wrote:

>
>>
>> Ah .... language language language.  It's the
>> source of many problems.
>>
>
>It is even more cumbersome if you are (like me) not a native English 
>speaker...sometimes I say something and later on I notice that everyone has 
>understood something else :-) 

Hi again,
   I just ran across the following today:

  "When I use a word, Humpty Dumpty said in
   a rather scornful tone, it means just what 
   I choose it to mean--nothing more nor less." 
                          ---Lewis Carroll

Ha ha ha.

[-Rick-]