What is coherent scattering and how does it differ from incoherent scattering?

Coherent scattering is a process in which incoming radiation interacts with a material in a way that maintains the phase relationship between the scattered waves. This results in constructive interference and a distinct pattern of scattering. In contrast, incoherent scattering involves interactions that do not maintain the phase relationship, leading to random scattering directions and no specific pattern.