A certain electronic transtion from an excited state to the ground state of the hydrogen atom in one or more steps gives rise to four lines in the ultra violet region of the spectrum how many lines does this transition produce in the infra red region ?

Options

A. 1
B. 3
C. 2
D. 4

Answer

To solve the problem of how many lines are produced in the infrared region for the given electronic transition in the hydrogen atom, we can follow these steps:

### Step 1: Identify the Series
The problem states that there are four lines in the ultraviolet (UV) region. In hydrogen, the transitions that produce lines in the UV region correspond to the Lyman series, which involves transitions from higher energy levels (n ≥ 2) to the ground state (n = 1).