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Two series of spectral lines of atomic hydrogen which do not belong to infrared spectral region are
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Lyman and Balmer
Lyman is the first spectral line and Balmer is the second spectral line of hydrogen.
Lyman spectral series range 100 nm maximum. In this reason, the Lyman series lies in the ultraviolet region.
Balmer spectral series range 100 nm to 1000 nm. In this reason, Balmer show highly visible region.
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