Write an empirical relation for Paschen series of hydrogen spectrum.

Write the empirical relation for paschen series lines of hydrogen atom.

Write an empirical relation for the Balmer series of hydrogen atom.

Write down of hydrogen spectrum .

Find the ratio between the wavelength of the most energetic' spectral lines in the Balmer and Paschen series of the hydrogen spectrum.

Find the ratio between the wavelength of the most energetic' spectral lines in the Balmer and Paschen series of the hydrogen spectrum.

When a photon corresponding to the third line of Paschen series of hydrogen spectrum is emitted, determine the change in angular momentum of the electron associated with the process.