GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Photoelastic stress, Photo 2 of 2. Photoelastic stress in a plastic tape dispenser is observed by placing it between co-aligned (Photo 1) and crossed (Photo 2) linear polarizers. Built-in stress causes optical birefringence which is revealed as colored bands when illuminated by white light. Photo 2 of 2.
Model release not required. Property release not required.