A gas of mono atomic hydrogen is excited by an energy of `12.75eV//"atom"`. Which spectral lines of the following are formed in Lyman, Balmer and Paschen series respectively.

If each hydrogen atom is excited by giveng 8. 4 eV of energy , then the number fo spectral lines emeitted si equal to :

Write the energy transistion equations for Balmer series and Paschen series spectra of hydrogen atom.

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

Indicate spectral regions corresponding to Lyman, Balmer, Paschen & brackett series in the line spectrum of hydrogen.

(a) Using Bohr's postulates, derive the expression for the total energy of the electron in the stationary states of the hydrogen atom. (b) Using Rydberg formula, calculate the wavelengths of the spectral lines of the first member of the Lyman series and of the Balmer series.

Ionisation potential of hydrogen atom is 13.6 eV. Hydrogen atom in ground state is excited by monochromatic light of energy 12.1 eV. The spectral lines emitted by hydrogen according to Bohr's theory will be-

In which part of the electromagnetic spectrum do the spectral lines of hydrogen atom as given by Balmer series occur?

Among the first lines of Lyman, Balmer, Paschen and Brackett series in hydrogen spectra which has higher energy

Calculate the wavelength of the first spectral line in the corresponding Lyman series of the hydrogen atom.