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An electron is trapped in a one-dimensional infinite potential well. For what (a) higher quantum number and (b) lower quantum number is the corresponding energy difference equal to the energy diflerence `DeltaF_(43)` between levels n = 4 and n = 3? (c) Show that no pair of adjacent levels has an energy difference equal to `2DeltaE_(43)`.

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(a) 11, (b) 10
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