![](http://www.alamy.com/thumbs/6/AE358F76-E0A1-4547-B5F6-F19BF1D95B87/CBC5F9.jpg)
Photoelastic stress in lenses
Photoelastic stress in spectacles' plastic lenses is observed by placing it between crossed linear polarizers. Built-in stress causes optical birefingence which is revealed as colored bands when illuminated by white light.
Size: 5120px × 3382px
Photo credit: © GIPhotoStock Z / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: birefringence, crossed, demonstration, education, educational, effect, glasses, lens, life, light, optical, optics, phenomenon, photoelastic, photoelasticity, physics, plastic, polarization, polarizer, polarizing, science, scientific, spectacles, stress