A `12.5 eV` electron beam is used to excite a gaseous hydrogen atom at room temperature. Determine the wavelengths and the corresponding series of the lines emitted.

A 12.5eV electron beam is used to bombard gaseous hydrogen at room temperature. What serious of wavelength will be emitted?

Determine the wavelength of the second line of the Paschen series for hydrogen.

A 12/5 eV electron beam is used to bombard gaseous hydrogen at room temperature. Upto which energy. Level the hydrogen atoms would be excited ? Calculate the wavelengths of the first memeber of Lyman and first member of Balmer series.

A 12.9 eV beam of electrons is used to bombard gaseous hydrogen atom at room temperature. Upto which energy level the hydrogen atoms would be excited? Calculate the wavelength of the first member of Paschen series and first member of Balmer series.

A 12.09 eV electron beam is used to bombard gaseous hydrogen at room temperature, Upto which energy level, the hydrogen atoms would be excited? Calculate the wavelengths of the second member of Lyman series and second member of Balmer series.

The wavelength of the first line of the Balmer series of hydrogen atom is lamda . The wavelength of the corresponding line line of doubly ionized lithium atom is