Q30. The shortest wavelength of the spectral lines in the Lyman series of hydrogen spectrum is $915 \tilde { A } \ldots$. The longest wavelength of spectral lines in the Balmer series will be $\_\_\_\_$ $\tilde { A } \ldots$.
Q30. The shortest wavelength of the spectral lines in the Lyman series of hydrogen spectrum is $915 \tilde { A } \ldots$. The longest wavelength of spectral lines in the Balmer series will be $\_\_\_\_$ $\tilde { A } \ldots$.