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A ptl is initially in its ground state in a box with infinite walls at x=0 and a. The wall of the box at x=a is suddenly moved to 2a.

(Energy conserved, wave fn. remains the same, basis changed)

We can calculate the probability that the ptl will be found in the ground state of the expanded box expanding initial wave fn with new basis(k= 2aPi/n )..

But..how can we find the state of the expanded box

(Energy conserved, wave fn. remains the same, basis changed)

We can calculate the probability that the ptl will be found in the ground state of the expanded box expanding initial wave fn with new basis(k= 2aPi/n )..

But..how can we find the state of the expanded box

**most likely to be occupied**by the ptl?(By the same method?? Calculate general expression of coefficent c`_n=<ψ`_n|ψ_1> and find n such that |c`_n|^2 max? it seems hard to find n)
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