HII regions slides
HII regions slides
HII regions slides
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Balmer seriesLyman series(UV)Recombination cascade in H-atom5HHH4H3H211 æ 1 1= Rç-2 2l è N nö÷øPaschen series (IR)N = no. of inner orbirtn = No. of outer orbitR = Rydberg const.H