A hypothetical atom has only three energy levels. The ground level has energy, $E_1=-8 \mathrm{eV}$. The two excited states have energies, $E_2=-6 \mathrm{eV}$ and $E_3=-2 \mathrm{eV}$. Then which of the following wavelengths will not be present in the emission spectrum of this atom?

• A

  $207 \mathrm{~nm}$
• Correct answer
  B

  $465 \mathrm{~nm}$
• C

  $310 \mathrm{~nm}$
• D

  $620 \mathrm{~nm}$

Hence, the correct answer is option: 'B'.