24. Consider the following portion of the energy-level diagram for hydrogen:

For which of the following transitions does the light emitted have the longest wavelength?
(A) n = 2 to n = 1
(B) n = 4 to n = 1
(C) n = 3 to n = 2
(D) n = 4 to n = 2
(E) n = 4 to n = 3

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