JEE Main 2026 — 4 April, Morning Shift — Question 49

$\quad \overline{\mathrm{V}}_{1}=\mathrm{R}_{\mathrm{H}}(\mathrm{z})^{2}\left[\frac{1}{2^{2}}-\frac{1}{3^{2}}\right] \Rightarrow \mathrm{I}^{\mathrm{st}}$ line of Balmer series $\overline{\mathrm{V}}_{2}=\mathrm{R}_{\mathrm{H}}(\mathrm{z})^{2}\left[\frac{1}{4^{2}}-\frac{1}{5^{2}}\right] \Rightarrow \mathrm{I}^{\mathrm{s}}$ line of Brackett series $\frac{\overline{\mathrm{V}}_{1}}{\overline{\mathrm{~V}}_{2}}=\frac{500}{81} \Rightarrow 5: 0.81$