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Homework Help: Convex and Concave Lens

  1. Jan 26, 2010 #1
    1. The problem statement, all variables and given/known data
    For each thin lens shown in the figure , calculate the location of the image of an object that is 18.5 {\rm cm} to the left of the lens. The lens material has a refractive index of 1.50, and the radii of curvature shown are only the magnitudes.

    http://session.masteringphysics.com/problemAsset/1028455/6/1028455.jpg%20 [Broken]
    s' (a)=?
    s' (b)=?
    s' (c)=?
    s' (d)=?


    2. Relevant equations
    no1/f= (n-1) (1/R1-1/R2)


    3. The attempt at a solution
    none
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Jan 26, 2010 #2

    rl.bhat

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    Homework Helper

    Using the relevant equation find the focal length of each lens.
    Then using the formula
    1/f = 1/do + 1/di find the position of the iamge.
     
  4. Jan 26, 2010 #3
    i did use it, but for no reason when i put back to the answer, they said it is incorrect
     
  5. Jan 26, 2010 #4

    rl.bhat

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    Homework Helper

    Show your calcualtions. With out that I can't see where your making mistakes.
     
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