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  • Try this! If the series limit frequency of the Lyman series is νL, then the series limit frequency of the Pfund series is :

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

  • Option 1)

    νL/25
     

  • Option 2)

    25 νL
     

  • Option 3)

    16 νL
     

  • Option 4)

    νL/16

 

Answers (1)

best_answer

For Lymen h\vartheta _{L}=13.6 ev

For p-fund  h\vartheta _{p}=\frac{13.5}{5^{2}}=\frac{13.6}{25}

\frac{\upsilon _{L}}{\upsilon _{P}}=25 or \upsilon _{p}=\frac{\nu _{L}}{25}

 

P-fund Series -

\frac{1}{\lambda }= R\left ( \frac{1}{5^{2}}- \frac{1}{n^{2}} \right )

\left ( infrared \right )

- wherein

n=6,7,8-----

When electron jump from higher orbital to n=5 energy level

 

 

Lymen series -

\frac{1}{\lambda }= R\left ( \frac{1}{1^{2}}- \frac{1}{n^{2}} \right )

\left ( uv \: region \right )

- wherein

n=2,3,4,-----

When electron jump from higher orbital to 1st energy level

i.e. ground state

    

 

 


Option 1)

νL/25
 

This is correct

Option 2)

25 νL
 

This is incorrect

Option 3)

16 νL
 

This is incorrect

Option 4)

νL/16

This is incorrect

Posted by

Aadil

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