What happens to oxygen during atmospheric absorption of radiation with a peak at 60 GHz

This question discusses atmospheric absorption of radiation (specifically 5G radio waves) due to oxygen at 60 GHz.

I would like to know exactly what happens to oxygen in all its forms (be it air or ozone) when it absorbs radiation at 60GHz.

I'm aware of different types of absorption but not sure what it means for oxygen. Also, the experiments cited in these types of Wikipedia articles seem to look at oxygen atoms or molecules in controlled environments, but I can't quite extract the lay explanations of what happens and how it applies to the air we breathe.

The oxygen molecule is unusual in having a ground state that has unpaired electrons, and this means it has a net spin of one. Technically the ground state is a triplet. This is unusual because ground states normally have spin zero i.e. they are singlets. For example the $$\mathrm{N}_2$$ molecule has a singlet ground state.