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Re: [ATM] .707*Radius

David Williams wrote:

>Hello list
>
>Sorry if is a little off topic, but what is the significance of .707*the measurement of the radius of the circle of the mirror you're making?  Another words (2^.5)/2*the radius.
>  
>
Half of the mirrors surface area lies within 0.707 x radius, and 
likewise half falls outside.    Essentially half the mirrors weight 
falls either side of this also, so in the past this was a popular place 
to support the mirror within its cell.    However, the computer program 
'PLOP' has changed our thinking in regard to this.

Lawrence Sayre

-- 
My philosophy, in essence, is the concept of man as
a moral being, with his own happiness as the moral
purpose of his life, with productive achievement as
his noblest activity, and reason as his only absolute.

Ayn Rand (in the appendix to 'Atlas Shrugged')

 

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