The principal line in the emission spectrum of sodium is yellow. On close examination, the line is
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The principal line in the emission spectrum of sodium is yellow. On close examination, the line is seen to be a doublet with wavelengths of 589.0 and 589.6 nm. Explain the source of this doublet.
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The lowerlying state is the level and state 2 S 12 and the upper level is 2 ...View the full answer
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