Suppose the energy of the longest-wavelength photon emitted by an electron in a box of length L is Eph. What is the energy of the photon with the fourth-longest wavelength that might be emitted?
A. (4/3)Eph
B. (5/3)Eph
C. (7/3)Eph
D. (8/3)Eph
E. 3Eph
D. (8/3)Eph
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