Lenses Prelab Assignment



Name:_________________________ Lab Section:________ 4-digit Code Number:____________

  1. Describe a quick way to tell a converging lens from a diverging lens with no equipment.
  2. Derive the formula for error in the focal length: (deltaf) / f2    =    (delta do) / do2    +    (delta di) / di2 from the lens grinder's equation.
  3. Describe in detail the two methods for determining the focal length of a diverging lens which are used in this lab.
  4. What is a third method for determining the focal length of a diverging lens which is not used in this lab?


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