問題詳情
43. An object is located at 40 cm from the first of two thin converging lenses of focal lengths 20 cm and 10 cm, respectively, asshown in the figure above. The lenses are separated by 30 cm.The final image formed by the two-lens system is located ______.
(A) 5.0 cm to the right of the second lens
(B) 13.3 cm to the right of the second lens
(C) infinitely far to the right of the second lens
(D) 13.3 cm to the left of the second lens
(E) 100 cm to the left of the second lens
參考答案
答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)