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  • Vega
    Vega

    @vega-Ic42ds • Jan 9, 2010

    It won't happen if you rotate it little slowly. The principle behind this phenomenon is that any image formed on ratina is retained on it for 1/6 th of a second. If a new image is received in less than 1/6th of a second, then these 2 images kind of mix in each other. This principle is used in motion pictures or films to cause an illusion of motion using series of pictures moved in front of eyes at fast speed.

    --Vega

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  • kunaljd
    kunaljd

    @kunaljd-worvpG • Jan 9, 2010

    it is called as persistence of vision

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  • Kaustubh Katdare
    Kaustubh Katdare

    @thebigk • Jan 10, 2010

    Tip: Instead of naming the thread 'Today's scientific question', please put the question itself in the thread.

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