Change in energy:
Use the energy and its uncertainty to determine which transitions (from initial energy level ni to nf) your data is consistent with.
1. Ef = 1.89e-9 eV; Ei =2.4e-9 eV
2. Ef = 1.95e-9 +/- 0.003e-9 eV; Ei = 2.51e-9 +/- 0.001e-9 eV
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