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15. The emission spectrum of calcium contains strong lines at 422.8, 610.4, 612.4, 616.4 and 1035 nm. all arising from transitions between the levels of the 4s2, 4s4p and 4s5s configurations he transition at 422.8 nm is also observed in absorption. Given that the singlet-triplet splitting in the 4s5s configuration is 177 700 m-1, draw a quantitative energy level diagram (units of m-1, referred to zero at the ground level) showing the transitions giving rise to the spectral lines listed above, and state any selection rules used in its deduction
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15. The emission spectrum of calcium contains strong lines at 422.8, 610.4, 612.4, 616.4 and 1035...
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