I wondered how a material (maybe for example a glass window) must be made to provide none or very few reflections. And while I think about it I don't really know which interaction is behind reflection. I think it must be rayleigh or thomson scattering? Compton scattering demands too high energy?!
There is also the question Why does a glass window reflect white objects white from an atomic scatterers’ viewpoint? but though it is very related it is more about the color/wavelength reflected, not the process in general.