(a)Find the wavelength of the radiation required to excited the electron is `Li^(++)` from the first to the third Bohr orbit (b) How many speciral are obseved in the emission apactrum of the above excited system?

(a)Find the wavelength of the radiation required to excited the electron is Li^(++) from the first to the third Bohr orbit (b) How many spectral lines are obseved in the emission spactrum of the above excited system?

(a)Find the wavelength of the radiation required to excited the electron is Li^(++) from the first to the third Bohr orbit (b) How many spectral lines are obseved in the emission spactrum of the above excited system?

(a) (i) Find the wavelength of the radiation required to excite thye elctron in Li(++) from the first to the third Bohr orbit. (ii) How many spectal lines are observed in the emission spectrum of the above excited system ? (b) The energy needed to detach the electron of a hydrogen-like ion in ground state in 4 rydberg. (i) What is the wavelength of the radiation emitted when the electron jumps from the first excited state ot the ground state ? (ii) What is the radius of first orbit ? (c ) A hydrogen sample is prepared in a particular excited state A. Photons of energy 2.55 eV get absorbed into the sample to take some electrons to a further excited state B. Find the quantum number of the A and B. (d) A hydrogen atom in a state having a binding energy of 0.85 eV makes transition to a state with excitation energy 10.2 eV. (i) Identify the quantum number n of the upper and the lower energy states. Find lambda .

Determine the wavelength of the radiation required to excite the electron in Li^(+ +) from the first to the third Bohr orbit.

Energy required for the electron excitation in Li^(++) from the first to the third Bohr orbit is

Energy required for the electron excitation in Li^(++) from the first to the third Bohr orbit is