Physics Unit22: Electromagnetic Waves (id: 11d1ff4ed)

本题目来源于试卷: Physics Unit22: Electromagnetic Waves，类别为 通用国际物理

[单选题]
A 15.0-mW laser puts out a narrm s)8:dgycw e4zov7d* ( b6revow beam 2f2zo* bh u/ch4.00 mm in diameter. What is the average (rms) value of the electric*czub h2/fo4 h field?

A. 0.95 kV/m
B. 1.3 kV/m
C. 1.9 kV/m
D. 2.7 kV/m


参考答案:  B


本题详细解析: 暂无

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