JEE Main On 08 April 2018 Question 7
Question: If the series limit frequency of the Lyman series is $ {v_L}, $ then the series limit frequency of the Pfund series is: [JEE Main Online 08-04-2018]
Options:
A) $ v _{L}/16 $
B) $ v _{L}/25 $
C) $ 25v _{L} $
D) $ 16v _{L} $
Show Answer
Answer:
Correct Answer: B
Solution:
- $ hv _{L}=13.6z^{2}( \frac{1}{1}-\frac{1}{\infty } ) $ $ hv=13.6z^{2}( \frac{1}{25}-\frac{1}{\infty } ) $
$ \Rightarrow v=\frac{v _{L}}{25} $
