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Which outcome increases when electrons encounter narrower potential barriers?

A)Quantum tunneling probability increases notably
B)Electron charge density remains constant
C)Barrier reflection becomes total internally
D)Electron energy becomes strictly quantized

💡 Explanation

Tunneling probability increases as barrier width decreases because wave functions decay less within a narrower barrier, therefore electrons more readily penetrate; rather than reflection increasing from refraction effects which require interfaces.

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