Stress Revealed in Color
A curved acetate sheet placed between crossed polarizers exhibits vivid interference colors due to stress-induced birefringence. Mechanical deformation creates anisotropy in the material, causing phase retardation between orthogonal polarization components of transmitted light. The resulting chromatic fringe patterns visualize internal stress distribution through photoelasticity and polarization-dependent optical interference.
—Image by Nuria Vargas, under the supervision of advisor Ana Karen Reyes, Universidad Politecnica de Tulancingo, Mexico
