Question: Q. 1. When is $\mathrm{H}_{\alpha}$ line of the Balmer series in the emission spectrum of hydrogen atom obtained?
U] [Delhi Comptt. I, II, III 2013]
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Solution:
Ans. $\mathrm{H}_{\alpha}$ line of the Balmer series in the emission spectrum of hydrogen atom is obtained in the visible region.
$$ \mathrm{v}=\mathrm{R}\left[\frac{1}{2^{2}}-\frac{1}{n_{i}^{2}}\right] $$
where, $n_{i}=3,4,5$,
When electron jumps from $n=2$ to $n_{i}=3$, then $\mathrm{H}_{\alpha}$ line will be obtained.
