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← ScienceWhich outcome accompanies applying stress to birefringent polymers between crossed polarizers?
A)Stress patterns become colored fringes✓
B)Refractive index always decreases notably
C)Polarization direction remains constant always
D)Material's transparency sharply increases
💡 Explanation
Stress induces changes in birefringence. This alters the polarization of light via photoelasticity, because stress changes the refractive indices along different axes. Therefore, distinct stress zones correlate to different polarized light wavelengths, which translate into colored fringes rather than uniform changes.
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