Recent content by libra10489

  1. L

    Thin Lenses: Understanding (3/2)f in Image Formation

    Oh..., now I feel stupid... OK I got it. Thanks.
  2. L

    Thin Lenses: Understanding (3/2)f in Image Formation

    Um...there are no numbers...if there were numbers I'd be able to plug and chug. I guess the confusing part is "An object is 3 times further from a lens than its focal length."
  3. L

    Thin Lenses: Understanding (3/2)f in Image Formation

    The only one I know is (1/object distance) + (1/image distance) = (1/focal length).
  4. L

    Thin Lenses: Understanding (3/2)f in Image Formation

    Homework Statement An object is 3 times further from a a lens than its focal length. Let f rep focal length. How man times the focal length of the lens is the image from the lense? The answer is (3/2)f but I don't understand why. Could someone please explain it to me?