Physics Unit25: Optical Instrument (id: 43bcfd674)

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本题目来源于试卷: Physics Unit25: Optical Instrument，类别为 Generic Physics

[单选题]
A person is designing a 10X8zwguqn0ztolhjr7)v 7b3 : + jv;av)j.u nl3 (qxu5ty u2l2d l telescope. If the telescope is limited to a length of 20 cm, what is the approximate focal length of the object ljaun3qux5 l)2.(vl;uy 2vdtive?

A. $16 \; cm$
B. $17 \; cm$
C. $18 \; cm$
D. $19 \; cm$


参考答案:  C


本题详细解析: 暂无