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12.Atoms
normal
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
A
$2 \to 1$
B
$3 \to 2$
C
$4 \to 2$
D
$5 \to 4$
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 $5 \rightarrow 4$
Standard 12
Physics
