![12th physics. NCERT notes 12th physics. NCERT notes](https://selfstudypoint.in/wp-content/uploads/2017/12/12th-physics.-NCERT-notes-696x218.jpg)
Atoms of each element are stable and emit characteristic spectrum. The spectrum consists of a set of isolated parallel lines termed as line spectrum. It provides useful information about the atomic structure.
The atomic hydrogen emits a line spectrum consisting of various series.
The frequency of any line in a series can be expressed as a difference of two terms