Question

Which of the following value of $n_{1}$ in the relationship $\frac{1}{\lambda}=R\left(\frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}}\right)$ is correct when $n_{2}>n_{1}$ corresponds to Paschen lines in the hydrogen spectrum?

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

Answer: (C)

For Paschen series in hydrogen spectrum
$n_{1}=3, n _{2}=4,5,6 \ldots \infty$ .
$ \frac{1}{\lambda}=R\left(\frac{1}{3^{2}}-\frac{1}{n_{2}^{2}}\right)$