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← ScienceWhich consequence results when applying compressive stress to polycarbonate?
A)Increased optical double refraction✓
B)Decreased molecular chain alignment
C)Enhanced isotropic refractive index
D)Diminished material tensile strength
💡 Explanation
Applying stress induces birefringence because preferential alignment occurs via the photoelastic effect; therefore, refractive index varies with light polarization direction, rather than remaining uniform under lower stress, because orientation is random.
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