Physics Unit22: Electromagnetic Waves (id: 051c2e380)

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 aa*w qmgv:5eb 8 narrow beam 2.00 mm in diameter. What i 8yav1r/5hopds the average (rms) value of rhpd85a1v oy /the magnetic field?

A. $4.5 \; mT$
B. $6.4 \; mT$
C. $9.0 \; mT$
D. none of the given answers


参考答案:  A


本题详细解析: 暂无

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