Apparent and actual radius (Optics!)

  1. Jan 22, 2013 #1
    I know the radius of a circle. I'm taking pictures of the circle as I bring it closer to the camera. Obviously the radius is getting larger. I want to know what the relationship is to find this out? I know the distance from the camera that the circle is at all times.
     
  2. jcsd
  3. Jan 22, 2013 #2

    jtbell

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