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  • Today's scientific question

    Kamlesh Dahale

    Member

    Updated: Oct 19, 2024
    Views: 1.1K
    When we rotate a burning stick in total darkness Why a image of a oval or a spherical shape forms in front of our eyes?
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Replies

  • Vega

    Member • 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

    Member • Jan 9, 2010

    it is called as persistence of vision
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  • Kaustubh Katdare

    Administrator • 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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