Discrete Spectrum
Discrete Spectrum : A spectrum in which the component wavelengths (and wave numbers and frequencies) constitute a discrete sequence of values (finite or infinite in number rather than a continuum of values. A Fourier analysis of a function will yield a discrete spectrum only if the function is periodic, or is assumed to be so, or if the function is represented by a finite sample of its values. Fourier series may be used for the analysis
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