How easily we are fooled: The rotating grid illusion | Hacker News

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		How easily we are fooled: The rotating grid illusion (ted.com)
		7 points by alexwg on Sept 21, 2008 \| hide \| past \| favorite \| 1 comment

nazgulnarsil on Sept 21, 2008 [–]

it's the same mechanism by which propellers spinning at certain speeds appear to be moving slowly, or even backwards.

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