A certain electronic transition from an excited state to the ground state of the H atom in one or mo — Atomic Structure Chemistry Question

💡 Solution & Explanation

UV lines belong to the Lyman series (ending at $n=1$). If 4 Lyman lines are produced, transitions occur from $n=5$ down to $n=1$. Infrared lines correspond to Paschen (ending at 3) and Brackett (ending at 4). From $n=5$, possible IR lines are $5\to4$, $5\to3$, and $4\to3$. Total = 3 lines.