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局域化的時變电荷和电流密度在真空中是电磁波的源。在有源的情形下，麦克斯韦方程组可以写成一个非齐次的电磁波方程（英文：Inhomogeneous electromagnetic wave equation）的形式，正是因为波源的存在使得偏微分方程变为非齐次。
, In electromagnetism and applications, an i … In electromagnetism and applications, an inhomogeneous electromagnetic wave equation, or nonhomogeneous electromagnetic wave equation, is one of a set of wave equations describing the propagation of electromagnetic waves generated by nonzero source charges and currents. The source terms in the wave equations make the partial differential equations inhomogeneous, if the source terms are zero the equations reduce to the homogeneous electromagnetic wave equations. The equations follow from Maxwell's equations.equations follow from Maxwell's equations.
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In electromagnetism and applications, an i … In electromagnetism and applications, an inhomogeneous electromagnetic wave equation, or nonhomogeneous electromagnetic wave equation, is one of a set of wave equations describing the propagation of electromagnetic waves generated by nonzero source charges and currents. The source terms in the wave equations make the partial differential equations inhomogeneous, if the source terms are zero the equations reduce to the homogeneous electromagnetic wave equations. The equations follow from Maxwell's equations.equations follow from Maxwell's equations.
, 局域化的時變电荷和电流密度在真空中是电磁波的源。在有源的情形下，麦克斯韦方程组可以写成一个非齐次的电磁波方程（英文：Inhomogeneous electromagnetic wave equation）的形式，正是因为波源的存在使得偏微分方程变为非齐次。
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Inhomogeneous electromagnetic wave equation
, 非齐次的电磁波方程
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