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Geometric Optics question

  1. Apr 29, 2005 #1
    Hello, I have been having some difficutly answering the following question:

    An object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a convex spherical mirror having a radius of curvature of 22.0 cm.

    Determine the position of the image.

    I used the formula: (1/s) + (1/s_prime) = 2/R

    s being the distance of the object from the mirror
    s_prime being the distance of the image
    R being the radius of curvature

    By position do they mean s_prime?

    The above formula didn't work for me, I also tried a few other ways but I keep getting the wrong answer. Hope you can help. =)
  2. jcsd
  3. Apr 29, 2005 #2
    Yes, they do mean s_prime, and if the formula doesn't work for you then your algebra is incorrect.
  4. Apr 29, 2005 #3


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    Gold Member

    Did you apply the appropriate sign conventions?
  5. Apr 29, 2005 #4
    I didn't, and that was my mistake. Thanks for your help!
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