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

A

$$207$$ nm

B

$$465$$ nm

C

$$310$$ nm

D

$$620$$ nm