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Infinite-distance object lens depiction

  1. Mar 14, 2012 #1
    This is rather simple but has me stumped. The assignment prompts me to create the construction rays of an object at infinity, refracting through a thin converging lens, with image focusing at focal point f. So where do the rays originate from?

    My guess was perhaps it means just a light source like the sun focusing at the focal point f, but it still confuses me. There is no mention of an object at infinite range in my textbook, so how should I go about this?
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Mar 14, 2012 #2


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    Welcome to PF!

    Yipyioh! Welcome to PF! :smile:
    yes, like the sun …

    and draw the lines parallel (because they "converge at infinity" :wink:)​
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