1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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...
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook