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You know the exhibit in Seeing the Light called Professor Pulfrich's  
Universe?  It functions similarly, though the ambiguously spinning  
shadow can usually be reversed by holding a smoked lens up to one  
eye.  If you google Pulfrich, you will see tons of resources about  
it.  There is one web site called Software In Motion that has free  
downloadable (with registration) software for macs to demonstrate  
these phenomena.

http://www.software-in-motion.com/downloads/

I somehow suspect that the right brain/left brain dominant thing is at  
best a simplification.


Eric Siegel
esiegel at nyscience dot org




Eric Siegel
Director and Chief Content Officer
New York Hall of Science
47-01 111th Street
Queens, NY 11368
www.nyscience.org
718.699.0005 x 317
esiegel at nyscience dot org



On Nov 11, 2008, at 8:50 AM, Jeff Courtman wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology  
> Centers
> Incorporated, a worldwide network of science museums and related  
> institutions.
> *****************************************************************************
>
> Like the one posted a few months ago where the b&w picture suddenly  
> became color - this one has me stumped.....any answers?
>
> http://tinyurl.com/33va3f
>
> Just because it is described as a left/right brain artifact, knowing  
> that does nothing to help me understand why!
>
> 	
>
>
>
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