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← ScienceWhich outcome occurs when a semiconductor's band gap narrows under intense illumination?
A)Reduced electron-hole recombination lifetime
B)Increased electrical conductivity ensues✓
C)Enhanced optical absorption decreases heavily
D)Phonon scattering rate stabilizes slowly
💡 Explanation
A narrowed band gap under strong light induces higher concentration of free carriers; Band Gap Narrowing alters the electronic structure promoting intrinsic conductivity, because the excitation overcomes prior barriers. Therefore conductivity increases rather than decreases because of other band effects.
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