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September 6, 2024 at 12:57 pm2504909744Subscriber
老师,您好。我有两个问题:1.就是我们在查看监视器的电场时,电场的表达式是E=Aexp[i(kr-wt)]还是复振幅E=Aexp(ikr)。 2. 根据欧拉公式exp(ix)=cosx+isinx 展开 的话 那Re是不是Acos(kr) 虚部为Asin(kr) abs=A angle =kr。谢谢
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September 11, 2024 at 1:35 amsidi.luSubscriber
您好,查看监视器时,电场为复数形式E(x,y,z) = A(x,y,z) exp [i phase(x,y,z)],拥有Ex,Ey,Ez 三个分量。
E=Aexp[i(kr-wt)]是波动方程平面简谐波通解。
祝好,
Sidi
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