This town Sajan related to the hydrogen spectrum of chapter number 2 of chemistry1. When the hydrogen spectrum was recorded the ground state of atom moves toward excited state and when they return back from the excited state to the ground state again the spectrum was recorded.2. Gradually it was fine that it was line spectrum and divided into 5 series and this is our Lyman ,balmar,pachan,bracket,p-fund.3. The ground state for lyman was 1 and excited state was two and three and its region is UV . The ground state of Balmer is too and excited status 3, 4 and 5 and its region is visible. Ground state for class 10 history and excited state is 5, 6 and region is Infrared. For brackett ground state is 4 and excited states five, six and reason is InfraredFor p fund excited status 6 and 7 and ground status 5 with infrared region