The transition from the state $n=4$ to $n=3$ in a hydrogen like atom results in ultraviolet radiation.…
The transition from the state $n=4$ to $n=3$ in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from
$2 \rightarrow 1$
$3 \rightarrow 2$
$4 \rightarrow 2$
$5 \rightarrow 4$
Solution
IR corresponds to least value of $\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)$
i.e. from Paschen, Bracket and Pfund series. Thus the transition corresponds to $5 \rightarrow 3$.