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Photoelastic stress in plastic protractor

Photoelastic stress in plastic protractor

C021/9968

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Credit

GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY

Caption

Photoelastic stress in plastic protractor. Photoelastic stress in a plastic protractor is observed by placing it between co-aligned (middle panel) and crossed (bottom panel) linear polarizers. Built-in stress causes optical birefringence which is revealed as colored bands when illuminated by white light. Also shown (top panel) is the same protractor in un-polarized light.

Release details

Model release not required. Property release not required.

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