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Fing image

  1. Dec 19, 2007 #1
    1. The problem statement, all variables and given/known data
    An object is kept at a distance d=2.5cm from a Glass sphere of radii R=10 cm .Find the final image of the point object?

    [tex]\mu =1.5[/tex]


    2. Relevant equations
    [tex]\frac{\mu_{2}}{v}-\frac{\mu_{1}}{u}=\frac{\mu_{2}-\mu_{1}}{R}[/tex]


    3. The attempt at a solution
    it is a simple question where we have two interfaces and we have to calculate the image due to 1st surface which acts as object for second and then the final image.
    But i am not getting the answer
     
    Last edited: Dec 20, 2007
  2. jcsd
  3. Dec 20, 2007 #2

    rl.bhat

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    Show your calculations. What is your answer? What are the values of refractive indices
     
  4. Dec 20, 2007 #3
    the answer is 15cm in front of mirror
    attempt being
    for the first case object distance is -2.5cm and R.I is 1.5 plugging in the formulae i get
    the image distance is v=-30/7
    so this ats as image for 2nd surface and bject distance being u=-170/7=-30/7-20

    again putiing in the values gives v=-85 cm which is far from the answer i don't get what i did wrong
     
  5. Dec 20, 2007 #4

    Shooting Star

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    The problem, as stated in the first para, presumably talks about a mirror. The attempt at solution talks about interfaces and RIs. Would you formulate the problem clearly?
     
  6. Dec 20, 2007 #5
    sorry it is a GLass SPhere
     
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