If the section is searched along all possible diffraction curves, all diffractions will be migrated correctly. The same physical processes are involved in generating reflections and diffractions. One can think of a reflection as the interference product of diffractions from many points on the reflector. Thus if the elements of reflection data are migrated as if they were elements of diffractions, the reflection will be migrated correctly (provided the cross-dip is zero). This principle forms the basis of automatic migration processes.