Atomic or nuclear collisions can be modeled using the ‘‘Welch’’ scattering apparatus. The student obtains and analyzes ‘‘macroscopic’’ data from a scattering experiment in order to ascertain ‘‘microscopic’’ properties (orientation and shape) of a hidden target. The procedure described emphasizes the analysis of data that are analogous to the data obtained in atomic or nuclear collision studies. The student finds that the position of a cluster of scattered projectiles indicates the orientation of the scattering surface while the density of the cluster indicates the shape (radius of curvature) of the scattering surface.