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← ScienceWhich effect occurs when applied stress narrows the band gap?
A)Increased electrical conductivity✓
B)Enhanced thermal conductivity
C)Reduced optical transmittance
D)Decreased electron mobility
💡 Explanation
Increased electrical conductivity happens because decreased band gap enables more electrons to jump to the conduction band via band gap narrowing; therefore conductivity rises, rather than reduced transmittance at different frequencies.
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