Many electrical appliances create a magnetic field when they are running.
Some displays (especially cathode ray tubes) are very susceptible to these
fields unless they have magnetic shielding. Some TVs will experience
interference from a vacuum cleaner. Passengers on commercial aircraft are
required to turn off electrical devices when planes are taking off or
landing because the magnetic fields from those devices can interfere with
navigation systems. Magnetic fields will also distort the colors on
displays.
Gary J. Klatsky
Department of Psychology [EMAIL PROTECTED]
Oswego State University (SUNY) http://www.oswego.edu/~klatsky
Oswego, NY 13126 Voice: (315) 341 3474
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On
Behalf Of Faith L Florer
Sent: Thursday, November 04, 1999 8:24 AM
To: [EMAIL PROTECTED]
Subject: perception question
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
