🌈 Photoelasticity & Birefringence: See Hidden Stress in Glass

Transparent plastics and tempered glass appear perfectly clear to our eyes, yet conceal massive internal structural stresses. When placed between crossed polarizers, anisotropic stress splits light into two perpendicular rays (birefringence), transforming invisible stress lines into vibrant chromatic rainbow fringe contours.

Test Specimen:

Analyzer Angle (Crossed):

Applied Load / Force: 60 N

Principal Stress Difference (σ₁ - σ₂): 42.8 MPa

Phase Retardation (δ): 3.2 λ

🌈 Photoelasticity in Action: Drag the load slider to watch stress fringes multiply. Each color band corresponds to an exact contour of equal principal stress difference!