問題詳情

55. If the five lenses shown below are made of the same material, which lens has the shortest positive focal length?
(A) 5d09d061e0570.jpg
(B) 5d09d0712bdc3.jpg
(C) 5d09d085d15d4.jpg
(D) 5d09d0978aabc.jpg
(E) 5d09d0a73e60f.jpg



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