I have started my course (a bit earlier than my university---that is why I am reading myself) in Quantum Physics.And I got the following queries to clarify:(adsbygoogle = window.adsbygoogle || []).push({});

Sometimes we need to accept seemingly contradictory features...I want to discuss them and clarify...

(i)Can we conceive a stationary (at rest) particle in QM?If so,do we need to associate a wave-function with it?

What I think:Qm is not worried about this.Even if it is possible,there will be no physically interesting situation...

(ii)In the expression of a(p),which is the Fourier transform of Ψ(x),time t is explicit.Yet, a(p) does not depend on time.

What I think:I do not understand why.

(iii)We know: <x>=∫(Ψ* x Ψ) dx and <p>=(ˉh/i) ∫[Ψ* (∂/∂x) Ψ] dx

where (h/2π)= ˉh

Why is Ψ* in the front place and not the Ψ?What would be the problem if the formula were:

<x>=∫(Ψ x Ψ*) dx and <p>=(ˉh/i) ∫[Ψ (∂/∂x) Ψ*] dx

What I think: I do not understand.

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# Homework Help: QM learner's question

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