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← ScienceWhich outcome results when compressive stress is applied at 45 degrees to a birefringent material used in a waveplate?
A)Rotation of output polarization azimuth✓
B)Increase in light transmission efficiency
C)Reduction in thermal expansion coefficient
D)Enhancement of Young's modulus value
💡 Explanation
Applied stress alters refractive indices, which causes a change in the **optical path difference** for the ordinary/extraordinary rays because the stress-optic effect modifies the birefringence; therefore, polarization is rotated rather than intensity fluctuations under consistent illumination.
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