Midterm 3 Review

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Unformatted text preview: pulse may be made up of an infinite number sinusoidal waves. The Fourier transform gives the spectrum of frequencies needed. The Fourier Transform of a pulse Consider a square pulse of width T . = = / / =− 1 / − / sin = − 2 sin ωT/2 The longer the duration of the pulse the narrower the spectrum becomes. For an infinitely long pulse the spectrum is a single frequency. For an infinitely short pulse the spectrum has all frequencies equally; ∆ = . ωT/2= 2π Δω= 4π/T The Fourier Transform and Diffraction , = ( (, ) ) A plane wave travelling per...
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This note was uploaded on 08/25/2013 for the course PHY 315 taught by Professor Staff during the Summer '08 term at University of Texas at Austin.

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