Maxwell equations: Lorentz force, plane electromagnetic waves, radiation, light waves, reflexion, refraction, Huyghens principle, diffraction, interference phenomena.

麦克斯韦方程组：洛仑兹力，平面电磁波，辐射，光波，反射，折射，惠更斯原理，衍射，干涉现象。

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Seismic and electromagnetic waves are treated as plane waves even though that assumption is not strictly correct.

即使假设并不严格成立，也常把地震波和电磁波看作是平面波。

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