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 - djv.bbrmoymrw1 p1v,i3(8l 0 equt0 out a narrow beav-(0zt9ek.wqrp 3y ghm 2.00 mm in diameter. What is the average (rms) value of tt qwr0-9v(pe3 ygzkh.he electric 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

微信扫一扫，分享更方便