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CLIP 8760

Why do wheels look like they are spinning backwards?

Why do wheels look like they are spinning backwards?
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Key Info
  • Why do wheels look like they are spinning backwards?
  • Duration: 04:08
  • Dr Yan Wong uses a spinning wheel and a TV screen to demonstrate how a moving image is made up from separate images. Is this visible in real life? Published as part of the Bang Goes the Theory website bbc.co.uk/bang/. Please note this clip is only available in Flash.
  • Subject:

    Science

       Topic:

    Bio: Human Body

  • Keywords: persistence of vision, optical illusion, BangGoesTheTheory
Ideas for use in class
  • As an illustration of how the mechanisms of human vision and TV are related but different.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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