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← ScienceWhich consequence results when a stress-aligned polymer film is illuminated?
A)Stress-induced birefringence becomes observable✓
B)Increased refractive index uniformity occurs
C)Polymer chains undergo depolymerization
D)Thermal expansion irreversibly stabilizes
💡 Explanation
When polarized light passes through a stressed polymer, chain alignment causes stress-induced birefringence, because differing refractive indices are experienced by light components; therefore, phase differences become observable rather than polymerization, which requires more energy.
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