Re: Sample cds

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From: The Lahrs (johnjan@lahr.org)
Date: Fri Nov 02 2001 - 05:31:58 PST 

Message-Id: <4.2.0.58.20011102062657.00b422c0@pop3.norton.antivirus>
Date: Fri, 02 Nov 2001 06:31:58 -0700
From: The Lahrs <johnjan@lahr.org>
Subject: Re: Sample cds

I have saved sample cds that I've gotten in the mail thinking they could be
> useful for some kind of science snack. Any ideas of a fun thing to do with
> them?
>
> thanks, Letty

Hi Letty,

CD's make great tops that will spin for a long time. If a paper pattern
is placed on the upper side, then optical illusions can be produced.

See this page:
http://lahr.org/john-jan/Illusions/fbkspin.html
for some ideas and instructions along these lines.

Cheers,
John
John C. Lahr
1925 Foothills Road
Golden, CO 80402
Phone: (303) 215-9913
john@lahr.org
http://lahr.org/john-jan/science.html

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