The time independent free particle is described by the equation ##e^{i(kx-\omega t)}##. Why do we use this equation instead of ##e^{i(kx+\omega t)}##. I know the answer is "because that's how nature works," but I want to know why we think nature works that way. Where did we get these equations from? Why was ##e^{i(kx-\omega t)}## postulated and not ##e^{i(kx+\omega t)}##?(adsbygoogle = window.adsbygoogle || []).push({});

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# B Why exp(ikx-iwt) and not exp(ikx+iwt)?

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