Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 30 - Atoms > Hydrogen atoms are excited from ground state of the principal quantum number 4. Then, the number of spectral lines observed will be

Hydrogen atoms are excited from ground state of the principal quantum number 4. Then, the number of spectral lines observed will be

Hydrogen atoms are excited from ground state of the principal quantum number 4. Then the number of spectral lines observed will be