Physics Unit23: Light and Geometric Optics (id: 52ed8fba5)

本题目来源于试卷: Physics Unit23: Light and Geometric Optics，类别为 通用国际物理

[单选题]
How far from a 50-mm focal lengthwo 4coad,7kq0 qa p,-2 9jmlwk sd7 z6* kz(mwhlens, such as is used in many 35-mm cameras, must an object be positioned if it is to form a real image magnified in size by a f6s(zk zw7m*h dactor of three?

A. $46 \; mm$
B. $52 \; mm$
C. $58 \; mm$
D. $67 \; mm$


参考答案:  D


本题详细解析: 暂无

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