If the ionisation energy of hydrogen atom is 13.6 eV , the energy required to excite it from ground

Question

If the ionisation energy of hydrogen atom is 13.6 eV , the energy required to excite it from ground state to the next higher state is approximately\

Professor PC Thomas Classes · Answer

(a) : $E_{n}=\frac{-E_{1}}{n^{2}} ; E_{1}=13.6 ; E_{n_{2}}=\frac{13.6}{4}=3.4 \mathrm{eV}$