Date: Fri Oct 16 11:39:43 2009

Author: Paul Nord

Subject: Re: Spinning Cylinders

Post:

Excellent reference and explanation Adam. Thanks.

To answer my previous question... Yes, you can make an animation with
a tube 4.5 diameters in length. I put lines around the diameter that
look like this: | / - \
The effect works better if you shield your view and only look at a
small section of the pipe at one time. But perhaps I just need a
fixed reference in each "frame" to guide the eye.

I wonder if a soft pipe would work better; something that would stick
to the table rather than slip. You'd need another method of spinning
it up. Perhaps something like a top spinner.

Is the guy from Educational Innovations on the list here? I want a
commission. We've invented the stick!

Paul

On Oct 16, 2009, at 10:10 AM, Adam Beehler wrote:

> cbettis@unlserve.unl.edu wrote:
>> Tom,
>> I played around with this and was wondering if there was a
>> reference. I tried different lighting, flourescent, incandescent
>> and a strobe. Do you know of an article about it?
>> Cliff
>
> http://www.exploratorium.edu/snacks/spinning_cyl/
>


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