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!

Converging Lens

  1. May 3, 2009 #1
    1. When an object 5.0 cm tall is placed 12 cm from a converging lens, an image is formed on the same side of the lens as the object but the image is 61 cm away from the lens. What is the focal length of the lens?



    2. 1/f = 1/do + 1/di



    3. 1/f = 1/do + 1/di
    = 1/12 + 1/61
    = 10.03 cm

    I'm not sure if this is right.
     
  2. jcsd
  3. May 3, 2009 #2
    Be careful with the signs of the distances. If you place the object on the left of the lens then you have d0 = +12 cm. But you also have an image on the left side of the lens. So check the sign of the image.
     
  4. May 10, 2009 #3
    oh ok thank you!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Converging Lens
  1. Converging lens (Replies: 8)

  2. Converging Lens (Replies: 1)

  3. Converging Lens (Replies: 1)

  4. Converging Lens (Replies: 4)

Loading...