Slovník pojmůWave equationWave equation is second-order differential equation for the intensity vector of electric field or the magnetic one. If field intensities meet wave equation, the field is of the form of wave. Considering intensity of harmonic electric field, wave equation is of the form Here, ∇ is differential operator (in Cartesian coordinates, ∇f = [∂f/∂x; ∂f/∂y;∂f/∂z]), E is the vector of electric field intensity, k denotes wave number, ω is angular frequency of harmonic wave, μ denotes permeability of the medium and Jvn is source current exciting wave. Dealing with the intensity of harmonic magnetic field, wave equation is of the similar form. Homogeneous wave equation is of the zero right-hand side (i.e., no source current appears here). Homogeneous wave equation describes the wave in a long distance from the source, where the influence of the source is negligible, and where wave becomes the source of another wave. Zpět
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