Which transition in the hydroged abom spectrum would have the same wavelength as the Balmer type tra

Question

Which transition in the hydroged abom spectrum would have the same wavelength as the Balmer type transition from $\mathrm{n}=4$ to $\mathrm{n}=2$ of $\mathrm{He}^{+}$spectrum

Professor PC Thomas Classes · Answer

Rydberg formula application for different hydrogen-like species.