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map7s
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A telescope has lenses with focal lengths f1 = +25.7 cm and f2 = +5.5 cm.
(a) What distance between the two lenses will allow the telescope to focus on an infinitely distant object and produce an infinitely distant image?
(b) What distance between the lenses will allow the telescope to focus on an object that is 5.0 m away and to produce an infinitely distant image?
I got the answer to the first part using the equation L=f obj +f eyp
however I do not know how to do the second part. I tried using the thin lens equation but I was not sure how to factor in the 5 m. (I did remember to convert to cm, so I know that that was not the problem.)
(a) What distance between the two lenses will allow the telescope to focus on an infinitely distant object and produce an infinitely distant image?
(b) What distance between the lenses will allow the telescope to focus on an object that is 5.0 m away and to produce an infinitely distant image?
I got the answer to the first part using the equation L=f obj +f eyp
however I do not know how to do the second part. I tried using the thin lens equation but I was not sure how to factor in the 5 m. (I did remember to convert to cm, so I know that that was not the problem.)