It is probably a similar experience to the Bronx Cheer Bulb you can try at:
http://www.exploratorium.edu/exhibits/bronx_cheer/Bronx_Cheer.html
The site provides a good explanation. The short answer is that they are moving but
the perception is that the distant objects are moving. I use the Exploratorium site
as
one of the parts of my Perception internet tutorial.
Rick
> Does anyone here know why it is that the numbers on a digital clock (and
> some images on a television screen) appear to jiggle when a person is
> using an electric toothbrush?
>
> I was asked this question in cognition class.
>
> Thank you.
>
> Faith Florer
>
> Faith Florer, Ph.D., Adjunct Asst. Professor Marymount College and NYU.
> http://www.river.org/~flf/Faith.html
>
Dr. Rick Froman
Psychology Department
Box 3055
John Brown University
Siloam Springs, AR 72761
[EMAIL PROTECTED]
http://www.jbu.edu/sbs/psych
Office: (501)524-7295
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"Happiness is not found by searching, but by researching."
