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: A magnifying glass problem

  1. Apr 24, 2010 #1
    1. The problem statement, all variables and given/known data
    A lens having a focal length 50 cm is used as
    a simple magnifier.

    What is the angular magnification obtained
    when the image is formed at the normal near
    point (25 cm)?


    2. Relevant equations

    1) m = N/d, where d is distance of object

    2) m = 1 + N/f

    3. The attempt at a solution

    1. The problem statement, all variables and given/known data
    A lens having a focal length 50 cm is used as
    a simple magnifier.

    What is the angular magnification obtained
    when the image is formed at the normal near
    point (25 cm)?

    I don't really get what do they want as the answer.

    Also, there are two equations, which one do I use?

    THanks! :)
     
  2. jcsd
  3. Apr 24, 2010 #2
    sorry - I found it! :)
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook