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Homework Help: Image Height

  1. Mar 29, 2010 #1
    1. The problem statement, all variables and given/known data
    Your friend is 1.7 m tall.

    What is the height of her image when she is 4.2 m from you?

    2. Relevant equations

    I used di/do and multiplied that by the height of the friend

    3. The attempt at a solution
    I did (4.2/3.5)(1.7) but it was wrong. Not really sure what I'm doing wrong here.
  2. jcsd
  3. Mar 29, 2010 #2


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    Homework Helper

    Where the image is formed? On the retina? What is 3.5 in your attempt?
  4. Mar 29, 2010 #3
    nevermind I found my mistake. thanks for the help though
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