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4 answers

your eyes can only see a certain number of still pictures a second. If the wheel is moving 3/4 of a turn forward every time you look your brain will believe it actually moved 1/4 of a turn backward. If it moved 1/2 a turn you wouldnt be able to tell if it was turning or not. That is why right before the wheel starts to look like its going backward it looks like its standing still.

An observer must be able to see the object twice as fast as the object is revolving. This is called the Nyquist rate or frequency_you_see_at >= 2*frequency_the_thing_moves_at


>= means greater than or equal to

2006-12-08 17:53:01 · answer #1 · answered by Anonymous · 1 1

yes when the spin gets to the right speed it dose apear that the wheels are turning anti rotation

2006-12-09 01:50:28 · answer #2 · answered by Anonymous · 0 0

you can read up more from this web link:
http://www.lukira.com/lukira/2006/07/optical_illusio.html

2006-12-09 01:52:46 · answer #3 · answered by shane 1 · 0 0

It's an optical illusion. <*)))><

2006-12-09 01:48:37 · answer #4 · answered by Sandylynn 6 · 0 0

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