What is hydrogen spectral series?

Explanation

The frequencies of the light emitted by a particular element would exhibit some regular pattern. Hydrogen is the simplest atom, the frequency (wavelength) of lines of emitted radiation adjusting progressively then spectrum is obtained and hydrogen has the simplest spectrum.
A specific set of lines can be formed according to their frequency or wavelength of lines obtained in the atom.s spectrum and such a group is called the spectral series.
The lines in some of the hydrogen spectrum sets are shown in the figure.

The spacing between lines within certain sets of the hydrogen spectrum decreases in a regular way.
Each of these sets is called a spectral series.