Fale to po prostu takie przemieszczającej się zaburzenia, co znaczy że faktycznie nic materialnego tam się nie przesuwa a jedynie te takie ruchy, wibracje się zmieniają, rozprzestrzeniają, rozpraszają, nakładają setki razy, itd.

Reflection is not a molecular level phenomenon. It's something bulk solids do. A photon absorbed by an electron in a single molecule is re-emitted at a random angle.

Solids are different. You don't have discrete electronic energy states in a solid like you do in a molecule, but continuous ranges (bands). When it comes to reflection on the surface of a solid (and you will not have reflection unless it's a certain thickness), it behaves more like a continuous, electrically-polarizable medium than something made up of atoms/molecules. Which is how reflection is modeled classically and how the Fresnel equations and such describing reflection are derived.

Going down to the molecular scale and/or involving quantum mechanics doesn't add anything, since quantum electrodynamics reproduces classical electromagnetism when it comes to larger scale phenomena like this. It just complicates the picture. It's just that these days they teach the quantum description of how molecules absorb and emit light before they teach classical electromagnetism in-depth. But reflection does not really work this way. (or at least, it's not a good way to look at it)

In the classical electrodynamics, light is considered as an electromagnetic wave, which is described by the Maxwell Equations. Light waves incident on a material induce small oscillations of polarisation in the individual atoms (or oscillation of electrons, in metals), causing each particle to radiate a small secondary wave (in all directions, like a dipole antenna). All these waves add up to give specular reflection and refraction, according to the Huygens-Fresnel principle.

In case of dielectric (glass), the electric field of the light acts on the electrons in the glass, the moving electrons generate a field and become a new radiator. The refraction light in the glass is the combined of the forward radiation of the electrons and the incident light and; the backward radiation is the one we see reflected from the surface of transparent materials, this radiation comes from everywhere in the glass, but it turns out that the total effect is equivalent to a reflection from the surface.

In metals, the electrons with no binding energy are called free electrons. The density number of the free electrons is very large. When these electrons oscillate with the incident light, the phase differences between the radiation field of these electrons and the incident field are pi, so the forward radiation will compensate the incident light at a skin depth, and backward radiation is just the reflected light.