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4. An electron is trapped in a one-dimensional infinite potential well of width L. (1) Find...

4. An electron is trapped in a one-dimensional infinite potential well of width L.
(1) Find wavefunction ψn(x) under assumption that the wavefunction in 1 dimensional box whose potential energy U is 0 (0≤ z ≤L) is normalized
(2) Find eighenvalue En of electron
(3) If the yellow light (580 nm) can excite the elctron from n=1 to n=2 state, what is the width (L) of petential well?
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