To what series does the spectral lines of atomic hydrogen belong if its wavenumber is equal to the difference between the wavenumber of the following two lines of the Balmer series `486.1` and `419.2 nm`? What is the wavelength of that line ?

Explanation

To solve the problem, we need to determine the series to which a spectral line of atomic hydrogen belongs, given that its wavenumber is equal to the difference between the wavenumbers of two lines in the Balmer series (486.1 nm and 419.2 nm). We will also find the wavelength of that line.

### Step-by-Step Solution:

1. **Convert Wavelengths to Wavenumbers**:
The wavenumber (ν) is given by the formula:
\[
\nu = \frac{1}{\lambda}
...