RegisterMoment method in spectral domain, spatial domainTemporal-spatial distribution of electromagnetic field is described by the term exp[j(ω t-kr)], where ω is angular frequency (a change of a phase over one second), t denotes time, k is wave-number (variation of phase over 1 meter in a given direction, i.e. spatial frequency), and r denotes length (in a given direction). Space-domain analysis is based on computations for a single value of the spatial frequency k (the distance r is a variable). In spectral-domain analysis, the distance r is considered as a constant, and computations are performed for all the possible spatial frequencies k. Back
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