In the Infinite Square Well problem, an energy eigenstate is in an equal superposition of two momentum eigenstates with eigenvalues that are opposite in sign(like standing waves that are formed by two wavefunctions corresponding to "opposite momentums").(adsbygoogle = window.adsbygoogle || []).push({});

So, for every energy eigenstate, we always have two possible outcomes for the momentum in a momentum measurement.

So, the question is, why does the uncertainty in the momentum change(increase) for different energy eigenstates if each eigenstate has exactly two outcomes?

Thanks in advance!

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# I Question about Uncertainty Principle

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