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Blue ball in front of a lense

  1. Apr 25, 2004 #1
    A very small blue ball is placed 50cm to the left of a convex lens of height 5 cm and focal length 10 cm. how far (in cm ) behind the lens will the image of the ball be formed.
     
  2. jcsd
  3. Apr 25, 2004 #2

    Doc Al

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    Staff: Mentor

    lens equation

    You'll need to use the lens equation: 1/o + 1/i = 1/f
    To find out what this equation means and how to use it, consult your text.
     
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