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← ScienceWhich consequence results when mechanical actuators stress a photoelastic material?
A)Stress-induced birefringence shifts polarization angles✓
B)Crystal lattice generates broad-spectrum emission
C)Increased thermal resistivity impedes heat flow
D)Piezoelectric effect generates voltage potential
💡 Explanation
Stress causes temporary anisotropy, therefore polarized light experiences varying refractive indices; this is stress-induced birefringence; the polarization angle rotates proportionally to the principal stress difference, rather than the other effects, because this aligns with stress tensor.
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