Re: [ATM] sheet polarizer

[Guy Brandenburg <gfbrandenburg@yahoo.com>]

surplus shed and american science & surplus have them, usually.

hermit <hermit@outofoptions.org> wrote: I picked up a couple of 14 inch square sheets on ebay under photo 
equipment.  I am told they are used by folks doing 'copy' work.

Ken Lowther

Dominic-Luc Webb wrote:
> I am wanting a low-cost source for 2 sheet polarizers, partly for
> educational purposes to demonstrate principle of parallel vs
> perpendicular beams. Plastic is good enough, but I of course would
> not mind fused silica. Anyone have suggestions?
>
> Dominic-Luc Webb
>
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> ATM mailing list http://www.atmlist.net/
>   

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"Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved."
- wtote Charles Darwin.
Guy Brandenburg, Washington, DC
My home page on astronomy, mathematics, education:
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
or else 
http://tinyurl.com/r6fh2
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