Question

The series limit of Balmer series is $3670$ A.The series limit for paschen series wil be:

• A. $8258A$
• B. $970A$
• C. $1632A$
• D. $14680A$

Answer 1

The correct option is A $8258A$

Given: Series limit of Balmer$=3670A°$

$\Rightarrow \frac{1}{{\lambda }_{B_{\infty }}}=R\left[\frac{1}{2^2}\right]$

To find series limit of Paschen

$\Rightarrow \frac{1}{{\lambda }_{P_{\infty }}}=R\left[\frac{1}{3^2}\right]$

$\frac{{\lambda }_{P_{\infty }}}{{\lambda }_{B_{\infty }}}=\frac{3^2}{2^2}=\frac{9}{4}\Rightarrow {\lambda }_{P_{\infty }}=\frac{9}{4}\times 3670=8258A°$