Find the quantum number of a ion if

PHYSICS · Subjective · CBSE · Physics · Atoms · Atoms

Problem

Find the quantum number

n

of a

\text{He}^+

ion if, on transition to the ground state, the ion emits two photons in succession with wavelengths

108.5\ \text{nm}

and

30.4\ \text{nm}

. The ionisation energy of the hydrogen atom is

13.6\ \text{eV}