Chapter 7, Problem 7.91QE

Interpretation Introduction

Interpretation:

The wavelengths of the two lowest energy lines of Paschen series have to be determined.

Concept Introduction:

The expression of the Rydberg equation to calculate the wavelength of lines of spectrum is as follows:

  $\frac{1}{\text{λ}}=R_{\text{H}}\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)$        (1)

Here, $n_1$ and $n_2$ are the energy levels of electron and also $n_1<n_2$ and $R_{\text{H}}$ is a Rydberg constant and has value $1.097\times {10}^7{\text{ m}}^{-1}$.