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Optics,how many images will the object form?

  1. Nov 3, 2012 #1
    optics,how many images will the object form???

    1. The problem statement, all variables and given/known data

    the lens shown in figure 19.16(http://img705.imageshack.us/img705/5066/figure1916.png [Broken] made of two different materials . a point object is placed on the axis....how many images will the object form???

    2. Relevant equations

    1/f = (n-1) [1/R1 - 1/R2], where f is the focal length, n is the refractive index, R1,R2 - radii of the curvature of refracting surfaces.

    3. The attempt at a solution

    i didnt reach the answer but i think it has something with refractive index , and focal lenth.....plz help..
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Nov 3, 2012 #2
    Re: optics,how many images will the object form???

    ya forgot the choices

    a)one

    b)two

    c)three

    c)no image
     
  4. Nov 4, 2012 #3
    Re: optics,how many images will the object form???

    If you just had the middle bit of the lens, would it form an image, more than one image, or none?
     
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