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I use liboff quantum mechanics text book fourth edition.

5.25 fomula of 122 page is [itex] \frac{1}{\sqrt{2\pi}}e^{ikx} [/itex]

I thought it is nomalized, but i don't know exactly why [itex] \sqrt{2\pi} [/itex] is denominator.

I think it seemed to be linked Dirac-delta function [itex] \int_{\infty}^{\infty}\frac{1}{2\pi}e^{i(k-k^{'})x} = \delta(k-k^')[/atex] but i have no idea what is going on exactly.

Please Help me

Thank for reading this question.

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# [Q]Momentum eigenstate normailization

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