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Question: Answered & Verified by Expert
The ratio of longest wavelength lines in the Balmer and Paschen series of hydrogen spectrum is
PhysicsAtomic PhysicsAP EAMCETAP EAMCET 2015
Options:
  • A $\frac{5}{36}$
  • B $\frac{7}{20}$
  • C $\frac{7}{144}$
  • D $\frac{5}{27}$
Solution:
2117 Upvotes Verified Answer
The correct answer is: $\frac{7}{20}$


On dividing Eq. (B) by Eq. (A), we get
$\frac{\lambda_{B L}}{\lambda_{P L}}=\frac{7}{20}$

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