It is true that lines in one spectral series can overlap lines in another, so n₁ = 1 series for the H atom can overlap the range in the n₁ = 2 series.
In the spectrum of light when a series of lines are emitted by excited atoms of an element where each line is connected to the others by an easy numerical equation and can be identified with a particular level of energy of an atom of an element is called a spectral series. Some of the spectral series are Lyman, Paschen, Pfund, Balmer, and Humphreys series. The range is 821.2nm to 1876.9nm.
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