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Lens MagnificationHELP

  1. May 12, 2007 #1
    1. The problem statement, all variables and given/known data

    A microscope is made in a tube 25.0 cm long. It magnifies 5.00 x 10to the 2 times, 50.0 times by the objective lens and 10.0 times by the eyepiece. What are the focal lengths of the two lenses?

    2. Relevant equations
    m= H/h=-q/p
    q= p(f) / p-f
    H= -h(q/p)

    3. The attempt at a solution
    GIVEN m= 5.00 * 10 to the 2
    REQUIRED f= focal length = ? cm is what i am trying to find
    I don't think i have the right equation but i don't know which equation to use.
  2. jcsd
  3. May 13, 2007 #2
    u have got f-ob + f-eye = 25 cm...
    Now....f-ob / f--eye = m

    now u have two variables and two equations ...just solve it out...i couldn't get the later part of the question actually...
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