JEE Main & Advanced
Sample Paper
JEE Main - Mock Test - 43
question_answer
The wavelength of the first spectral line in the Banner series of hydrogen atom is\[6561\text{ }!\overset{o}{\mathop{A}}\,\]. The wavelength (in \[\overset{o}{\mathop{A}}\,\]) of the second spectral line in the Balmer series of singly-ionized helium atom is