CUET · PHYSICS · PYQ PAPER 2023
If \( \lambda_1 \) and \( \lambda_2 \) are the longest wavelengths of the Lyman and Paschen series respectively, then \( \lambda_1 : \lambda_2 \) is:
- A 1 : 30
- B 1 : 3
- C 7 : 108
- D 7 : 50
Answer & Solution
Correct Answer
(C) 7 : 108
Step-by-step Solution
Detailed explanation
\( \frac{1}{\lambda_1} = R \left( \frac{1}{1^2} - \frac{1}{2^2} \right) = R \left( 1 - \frac{1}{4} \right) = \frac{3R}{4} \) \( \lambda_1 = \frac{4}{3R} \)…
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