Question

The transition of an atom from $ n = \infty $ to $ n = 3 $ represents:

• A. Shortest wavelength of Paschen series
• B. Longest wavelength of Paschen series
• C. Shortest wavelength of Balmer series
• D. Longest wavelength of Balmer series

Hint:

The shortest wavelength in any series of transitions in the hydrogen atom occurs when the electron transitions from \( n = \infty \) to the series' limit level.

Answer 1

The Correct Option is A

In the hydrogen atom, the transition from \( n = \infty \) to \( n = 3 \) corresponds to the shortest wavelength of the Paschen series. The Paschen series occurs when the electron transitions to \( n = 3 \) from a higher energy level. The shortest wavelength occurs when the transition is from \( n = \infty \) to \( n = 3 \).
Thus, the correct answer is \( A \).