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Q243) In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen?


Third line means third excited state
i.e. n1= 2 Balmer series (visible region)
n2 = 5 Third line ∴ Third line will appear when electron comes from 5th energy level to 2nd level.