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Homework Help: Lenses PLEASE HELP

  1. Feb 25, 2010 #1
    1. The problem statement, all variables and given/known data

    Calculate a value for fD (the focal length of the diverging lens). Would this experiment be possible if fC > |fD|?

    2. Relevant equations

    Fcombo= (dodi)/(do+di)= (25*46)/(25+46) = 16.2 cm

    1 - 1 = 1 fD= -24.83 cm
    16.2 9.8 fD

    Fcombo= (dodi)/(do+di)= (23*48)/(23+48) = 15.5 cm

    1 - 1 = 1 fD= -26.69 cm
    15.5 9.8 fD

    3. The attempt at a solution

    This experiment would not work if fC > |fD| because there would be no image produced on the screen, which would not be able to be measured to give us a di; we would be left with no way to calculate a Fcombo or a fD.

    What is a better way to explain what happens? PLEASE HELP
  2. jcsd
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