Re: [ATM] mirror or lens?

["matt" <electro_optic@bellsouth.net>]

if you want sillyness , the electron-hole concept is my favorite . Along the
lines of dark is the absence of light ;-)

best regards,
matt tudor




-----Original Message-----
From: Goat Tosser <goat@access.bpa.nu>
To: clnoble@email.arizona.edu <clnoble@email.arizona.edu>; atm@atmlist.net
<atm@atmlist.net>
Date: Monday, August 01, 2005 3:18 PM
Subject: Re: [ATM] mirror or lens?


>
>----- Original Message -----
>From: <clnoble@email.arizona.edu>
>To: <atm@atmlist.net>
>Sent: Tuesday, August 02, 2005 4:22 AM
>Subject: Re: [ATM] mirror or lens?
>
>
>> When optical engineers do ray traces on optical systems, many just
>> consider a
>> mirror to be a lens with a negative index of refraction, so that when
>> light
>> hits it, it goes the opposite way from which it came.  This may be what
he
>> was
>> referring to, but it does not mean a lens is neccesarily a mirror.
>
>. . . and cold is merely the absence of heat, dark is the absence of light.
> Each is the opposite ends of the same stick.
>
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