- #1
emol1414
- 18
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Hi, I'm stuck in this Griffiths' Introduction to QM problem (#2.8)
A particle in the infinite square well has the initial wave function
[itex]\Psi(x,0) = Ax(a-x)[/itex]
Normalize [itex]\Psi(x,0)[/itex]
[itex] \int_{0}^{a} |\Psi(x)|^2 dx = 1 [/itex]
Haha, this is supposed to be the least of my problems but... doing
[itex] A^2 \int_{0}^{a} x^2 (a-x)^2 dx = 1 [/itex]
gives us [itex] A = \sqrt{\frac{30}{a^5}} [/itex].
When the correct answer is [itex] A = \sqrt{\frac{2}{a}} [/itex]. I have no clue what I did wrong...
Homework Statement
A particle in the infinite square well has the initial wave function
[itex]\Psi(x,0) = Ax(a-x)[/itex]
Normalize [itex]\Psi(x,0)[/itex]
Homework Equations
[itex] \int_{0}^{a} |\Psi(x)|^2 dx = 1 [/itex]
The Attempt at a Solution
Haha, this is supposed to be the least of my problems but... doing
[itex] A^2 \int_{0}^{a} x^2 (a-x)^2 dx = 1 [/itex]
gives us [itex] A = \sqrt{\frac{30}{a^5}} [/itex].
When the correct answer is [itex] A = \sqrt{\frac{2}{a}} [/itex]. I have no clue what I did wrong...