Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

One perturbative solution to this kind of problem takes the form of an infinite series of Feynman diagrams that diverges. When finding an approximation for this kind of problem in the case of long wavelengths, the exponential term simply vanishes and all that must be integrated is the interaction potential; that is a special case of the Born Approximation. In quantum mechanics, this kind of problem usually is solved by finding the associated (*) amplitude of a wave, given that a plane wave encounters a potential and is transformed into a spherical wave. Classically, this type of problem is typically solved by finding the namesake angle given the impact parameter. For 10 points, name this kind of process in which a particle changes direction after a collision.
Science