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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Giphotostock |
Bildgröße: | 4024 px × 8000 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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