Physics Unit23: Light and Geometric Optics (id: 7d12ba56e)

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]
A single concave spherqch81-) m4 ; tm urhrigy.tz hfdh.b80iq;t u6n:wn+ lygau3/mcal mirror produces an image which is

A. always virtual.
B. always real.
C. real only if the object distance is less than $f$.
D. real only if the object distance is greater than $f$.


参考答案:  D


本题详细解析: 暂无

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