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CUET · PHYSICS · PYQ PAPER 2023

The correct sequence A, B, C, D, E with reference to atomic spectral series is :
(A) Lyman series \(\frac{1}{\lambda}=R\left(\frac{1}{A^2}-\frac{1}{n^2}\right)\)
(B) Balmer series \(\frac{1}{\lambda}=R\left(\frac{1}{B^2}-\frac{1}{n^2}\right)\)
(C) Pfund series \(\frac{1}{\lambda}=R\left(\frac{1}{C^2}-\frac{1}{n^2}\right)\)
(D) Brackett series \(\frac{1}{\lambda}=R\left(\frac{1}{D^2}-\frac{1}{n^2}\right)\)
(E) Paschen series \(\frac{1}{\lambda}=R\left(\frac{1}{E^2}-\frac{1}{n^2}\right)\)
Choose the correct answer from the options given below :

  1. A (A), (B), (C), (D), (E)
  2. B (B), (A), (E), (C), (D)
  3. C (A), (B), (E), (D), (C)
  4. D (E), (D), (C), (B), (A)
Verified Solution

Answer & Solution

Correct Answer

(C) (A), (B), (E), (D), (C)

Step-by-step Solution

Detailed explanation

(A) Lyman series: \( A=1 \) (B) Balmer series: \( B=2 \) (E) Paschen series: \( E=3 \) (D) Brackett series: \( D=4 \) (C) Pfund series: \( C=5 \) The correct sequence with reference to atomic spectral series (Lyman, Balmer, Paschen, Brackett, Pfund) is (A), (B), (E), (D), (C).