Question

he emission spectrum of hydrogen is found to satisfy the expression for the energy change $\Delta E$ (in joules) such that

($\Delta E = 2.18 \times 10^{- 18}\left( \frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}} \right)J$ where $n_{1} = 1,2,3,....$ and $n_{2} = 2,3,4.$ The spectral lines corresponds to paschen series if.

• A. $n_{1} = 1$ and $n_{2} = 2,3,4$
• B. $n_{1} = 3$ and $n_{2} = 4,5,6$
• C. $n_{1} = 1$ and $n_{2} = 3,4,5$
• D. $n_{1} = 2$ and $n_{2} = 3,4,5$

Answer 1

Answer: (B)

$n_{1} = 3$ and $n_{2} = 4,5,6$

Answer 2

: For paschen series, $n_{1} = 3$ and $n_{2} = 4,5,6...$