2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79881We report the first direct experimental observation of scarring phenomenon in transverse vibrational modes of a thin metal plate. The plate has the shape of a full stadium and clamped boundary conditions. Normal modes are imaged using time-averaged holographic interferometry, and modes corresponding to ``bouncing ball'' and higher order periodic trajectories are found. An eikonal approximation of the solution along classical trajectories of the stadium including nontrivial phase shifts at clamped boundaries yields a useful quantization condition for the observed modes.13 pages, 3 figures; data reexamined; 1 figure and 1 ref. addedChaotic Dynamicstext