Physics Unit23: Light and Geometric Optics (id: 793de180d)

本题目来源于试卷: Physics Unit23: Light and Geometric Optics，类别为 国际高中通用物理

[单选题]
A spherical concave mirrori(l6a;da7 dp z +;bous has a raeye*83 wtdclzc56;y.w wc jn 9dius of curvature of 20 cm. How far from the mirror is the focal po68yn l eew*td5w cc3j. ;9wzcyint located?

A. $10 \; cm$
B. $20 \; cm$
C. $30 \; cm$
D. $40 \; cm$


参考答案:  A


本题详细解析: 暂无

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