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Re: [ATM] Stripping to re-figure?

I found something slightly different at
http://mathforum.org/dr.math/faq/formulas/faq.sphere.html,
being to lazy to derive the formula myself.

  Spherical Cap = The portion of a sphere cut off by a
plane. 
     Radius of sphere: r
     Radius of base: r1
     Height: h
     Surface area: S
     Volume: V

          r = (h^2+r1^2)/(2h)
          S = 2*Pi*r*h
          V = (Pi/6)*(3*r1^2+h^2)*h

--- Jeff Baldwin <bald@centurytel.net> wrote:

> You can calculate the sagitta volume of the mirror,
> V=pi*r^4/(4R),  whee r 
> is the radius of the mirror, R is the ROC of the
> center zone, and determine 
> how much to pour onto the mirror, let it sit
> overnight, then dispose of it 
> properly.  The stuff works great and no rubbing is
> required.
> JBald
> 
> Jeff and Glenda Baldwin
> Beaver WA
> http://home.centurytel.net/bald
> 

Guy  Brandenburg
Washington, DC
My home page:
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
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