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← ScienceWhich phenomenon enhances LCD contrast when voltage changes?
A)Electrically controlled birefringence✓
B)Spontaneous parametric down-conversion
C)Surface plasmon resonance tuning
D)Quantum entanglement purification
💡 Explanation
Applying voltage aligns liquid crystals, causing electrically controlled birefringence, therefore changing light polarization and thus transmission from minimal to maximal, rather than other optical phenomena that don't manipulate polarization states.
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