- #1

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## Main Question or Discussion Point

In the following link:

http://electron6.phys.utk.edu/QM1/modules/m1/free_particle.htm

please look at the part where it says "We may write the Fourier transform of...". I am unable to understand how the next following steps work. Could someone explain this please? :)

http://electron6.phys.utk.edu/QM1/modules/m1/free_particle.htm

please look at the part where it says "We may write the Fourier transform of...". I am unable to understand how the next following steps work. Could someone explain this please? :)