Explain the Balmer series and provide its equation.

(N/A) In $1885$,Johann Balmer demonstrated through experimental observations that the spectral lines of the hydrogen spectrum in the visible region can be expressed using the wave number $(\bar{\nu})$ formula:
$\bar{\nu} = 109677 \left( \frac{1}{2^{2}} - \frac{1}{n^{2}} \right) \text{ cm}^{-1}$
where $n = 3, 4, 5, \dots$
This set of spectral lines is known as the Balmer series. It is the only series in the hydrogen emission spectrum that lies within the visible region of the electromagnetic spectrum.