1. Not finding help here? Sign up for a free 30min 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!

Distance between the object and the lens

  1. Jun 4, 2008 #1
    1. The problem statement, all variables and given/known data

    A diverging lens of 6 mm focal length produces an image of magnification m = 1/2. What
    is the distance between the object and the lens?
     
  2. jcsd
  3. Jun 4, 2008 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Libra_girl ! Welcome to PF! :smile:

    Hint: what equations do you know that relate the size of the object to the size of the image? :smile:
     
  4. Jun 4, 2008 #3

    Is it the equation: do/di = m or 1/do + 1/di = 1/f ?
     
  5. Jun 4, 2008 #4

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Both equations! :smile:

    Except isn't it m = -di/do? :rolleyes:
     
  6. Jun 4, 2008 #5

    yeah it is sorry :smile:
     
    Last edited: Jun 4, 2008
  7. Jun 4, 2008 #6
    Ok so I know f and I know m, now I am solving for do, but I don't know the di?
     
  8. Jun 5, 2008 #7

    alphysicist

    User Avatar
    Homework Helper

    Hi Libra girl,

    You now have two equations in two unknowns. You can solve the magnification formula for one of the variables and plug it into the other formula. What does that give?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Distance between the object and the lens
Loading...