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Q.
Transition from $ n=4,5,6 $ to $ n=3 $ in hydrogen spectrum gives:
J & K CETJ & K CET 2000
Solution:
For Paschen series in hydrogen spectrum the transition is as: $ {{n}_{1}}=3 $ and
$n_{2}=4,5,6, \ldots . \infty$
$\frac{1}{\lambda} R\left[\frac{1}{3^{2}}-\frac{1}{n_{2}^{2}}\right]$