Question

Minimum wavelength of Brackett series corresponds to transition from $ n_1 $ to $ n_2 $, where $ n_1 $ and $ n_2 $ are respectively...

• A. \( 4, 3 \)
• B. \( 5, 4 \)
• C. \( 6, 5 \)
• D. \( 7, 6 \)

Hint:

For spectral series like Brackett, the minimum wavelength corresponds to the transition with the largest energy difference, which typically happens from the highest \( n \) to the next lower \( n \).

Answer 1

The Correct Option is B

In the Brackett series, the transitions occur between higher energy levels. The minimum wavelength in the Brackett series corresponds to the transition from \( n = 5 \) to \( n = 4 \).
Thus, the correct pair for the minimum wavelength in the Brackett series is: \[ n_1 = 5, \quad n_2 = 4 \] Therefore, the correct answer is \( 5, 4 \).