Re: [ATM] Basic mirror support question...

[hermit <hermit@outofoptions.org>]

Dale Eason wrote:

>
>Vlad already responded with the correct answer. 
>Basically it surprises most people that two plan
>surfaces no matter how smooth will only touch at three
>places.  From math we know that three points define a
>plane.  The two plans will define a third plane where
>they touch.  They will touch at the mutual high points
>on their surfaces.
>
>  
>
It is relatively trivial in real life to grind a mirror back smooth and 
then lay it on somthing like cheap astro turf.  This WILL support the 
mirror adequeatly and I am sure it would pass the star test IF you can 
reach thermal equalibrium.  Remeber, the night air for most of us is 
constantly changing.  It has been suggested before and I'm sure there 
are those that have tried it.   I think we are on the verge of some of 
our winter over thinking here. ;)

Ken
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