Infinite-distance object lens depiction

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SUMMARY

The discussion centers on the construction of rays from an object at infinity refracting through a thin converging lens, with the image focusing at the focal point (f). Participants confirm that the rays can be represented as parallel lines, originating from a distant light source, such as the sun. This method simplifies the depiction of light rays converging at the focal point, despite the lack of specific textbook references on infinite-range objects.

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Yipyioh
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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?
 
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Yipyioh! Welcome to PF! :smile:
Yipyioh said:
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?

yes, like the sun …

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

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