If the series limit frequency of the Lyman series is νL, then the series limit frequency of the Pfund series is :

Question

If the series limit frequency of the Lyman series is νL, then the series limit frequency of the Pfund series is : (A) 25 νL (B) 16 νL (C)  νL / 16  (D)  νL / 25

Tardigrade Admin · Accepted Answer

h vL=E[(1/12)-(1/∞)]=E h vP=E[(1/52)-(1/∞)]=(E/25) ⇒ vP=(vL/25)

Q. If the series limit frequency of the Lyman series is $ν_{L}$ , then the series limit frequency of the Pfund series is :

$25 ν_{L}$

$16 ν_{L}$

$ν_{L} /16$

$ν_{L} /25$

$h v_{L} = E [\frac{1}{12} - \frac{1}{\infty}] = E$
$h v_{P} = E [\frac{1}{5 ^{2}} - \frac{1}{\infty}] = \frac{E}{25}$
$\Rightarrow v_{P} = \frac{v _{L}}{25}$

Q. If the series limit frequency of the Lyman series is νL​, then the series limit frequency of the Pfund series is :

25νL​

16νL​

νL​/16

νL​/25