MHT CET · Physics · Atomic Physics
The ratio of the wavelength of the last line of Paschen series to that of Balmer series is
- A \(\frac{9}{4}\)
- B \(\frac{3}{2}\)
- C \(\frac{2}{3}\)
- D \(\frac{4}{9}\)
Answer & Solution
Correct Answer
(A) \(\frac{9}{4}\)
Step-by-step Solution
Detailed explanation
\( \frac{1}{\lambda_P} = R \left( \frac{1}{3^2} - \frac{1}{\infty^2} \right) \Rightarrow \lambda_P = \frac{9}{R} \) \( \frac{1}{\lambda_B} = R \left( \frac{1}{2^2} - \frac{1}{\infty^2} \right) \Rightarrow \lambda_B = \frac{4}{R} \)
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