- #1
fredrick08
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Homework Statement
which of the following functions are eigenfunctions of the momentum op? what are the eigenvalues in these cases?
[tex]\psi[/tex](x)=Asin(kx)
[tex]\psi[/tex](x)=Asin(kx)-Acos(kx)
[tex]\psi[/tex](x)=Acos(kx)+iAsin(kx)
[tex]\psi[/tex](x)=Aexp((ik(x-a))
Homework Equations
Pop=hbar/i(d/dx)
The Attempt at a Solution
ok now my understanding of an eigenfn is that if u multiply the operator and function, ad the result is the function*constant, then the that function is an eigenfn, I am not quite sure though what the eigen value is... i think its the value of the constant. so i did the math(its probably wrong)
1.(hbar/i)(Akcos(kx))[tex]\neq[/tex]const*fn
2.(hbar/i)(Akcos(kx)+Aksin(kx))[tex]\neq[/tex]const*fn
3.(hbar/i)(Aksin(kx)+iAkcos(kx))=(hbar/i)(k)*fn, thus eigen value=(hbar*k/i)?
4.(hbar/i)(ikAexp(ik(x-a)))=(hbar*k)*fn, thus eigen value=hbar*k
please can some help me if I am wrong... I am just a bit unsure, i it looks ok, but can anyone confirm, TY