Question

Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atom in ground state is excited by monochromatic light of energy 12.1 eV. The spectral lines emitted by hydrogen according to Bohr's theory will be:

• A. One
• B. Two
• C. Three
• D. Four

Answer 1

The correct option is C Three


$\Delta E=-13.6-E_2=12.1eV$
$E_2=1.5eV$

The final state corresponds to n = 3.
Total number of lines observed $=\frac{n_2\times (n_2-1)}{2}=3$