Question: (a) Find the excitation energy from the ground level to the third excited level for an electron confined to a box that has a width

(a) Find the excitation energy from the ground level to the third excited level for an electron confined to a box that has a width of 0.125 nm.
(b) The electron makes a transition from the n = 1 to n = 4 level by absorbing a photon. Calculate the wavelength of this photon.

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