Arrange the following Spectral series with lower energy state quantum number $n_f$ in the order as ($n_f$ = 1, 2, 3, 4, 5)
A. Balmer series
B. Paschen series
C. Brackett series
D. Lyman series
E. Pfund series
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → D, A, B, C, E
$\frac{1}{λ}=RZ^2\left(\frac{1}{{n_i}^2}-\frac{1}{{n_f}^2}\right)$
for,
Lyman, $n_i=1$
Balmer, $n_i=2$
Paschen, $n_i=3$
Brackett, $n_i=4$
P-fund, $n_i=5$
∴, λ increases
Lyman < Balmer < Paschen < Brackett < P-fund
D < A < B < C < E