Transcription of Chapter 10. Fourier Transforms and the Dirac Delta Function
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Chapter 10. Fourier Transforms and the Dirac Delta Function
Vector Spaces in Physics 8/6/2015 10 - 1 Chapter 10. Fourier Transforms and the Dirac Delta Function A. The Fourier transform . The Fourier -series expansions which we have discussed are valid for functions either defined over a finite range (/ 2/ 2Tt T , for instance) or extended to all values of time as a periodic Function . This does not cover the important case of a single, isolated pulse. But we can approximate an isolated pulse by letting the boundaries of the region of the Fourier series recede farther and farther away towards , as shown in figure 10-1. We will now outline the corresponding mathematical limiting process. It will transform the Fourier series, a superposition of sinusoidal waves with discrete frequencies n, into a superposition of a continuous spectrum of frequencies.
10 - 1 Chapter 10. Fourier Transforms and the Dirac Delta Function A. The Fourier transform. The Fourier-series expansions which we have discussed are valid for functions either defined over a finite range ( T t T/2 /2, for instance) or extended to all values of …
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