Classical vs quantum model of scattering light

[Bilbo]

Hi guys, I need some quick help on some conceptual work...

What exactly is the difference between classical and quantum models of scattering light? That is to say, what are the differences between the classical models (I think this is Rayleigh, but unsure) and the Raman scattering model?

My idea right now (though I think it is completely wrong) is that the molecule that does the light scattering is only considered by its molecular properties. The vibrational states are ignored and only the molecular motions of the molecule is considered. In addition, the classical model has most of the molecules returning to the same energy level as before after scattering (elastic).

I think that Raman scattering is due to the vibrational levels of the molecule, with the molecule changing to an excited energy level after being hit by photons (inelastic).

In a state of confusion at the moment. Please !!:facepalm:

[Mathematics]

My idea right now (though I think it is completely wrong) is that the molecule that does the light scattering is only considered by its molecular properties. The vibrational states are ignored and only the molecular motions of the molecule is considered. In addition, the classical model has most of the molecules returning to the same energy level as before after scattering (elastic).

I think that Raman scattering is due to the vibrational levels of the molecule, with the molecule changing to an excited energy level after being hit by photons (inelastic).

In a state of confusion at the moment. Please !!:facepalm:

Yeah that sounds about right, Rayleigh scattering is elastic scattering of molecules, where a photon is absorbed and subsequently re-emitted with the same energy. Raman scattering occurs when a photon is absorbed and then re-emitted with a different energy, which can be higher or lower than the incident photon, depending on what energy state the molecule is in initially. Sorry I don't know if the rotational and vibrational energies of the molecule come into it.