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← ScienceWhich outcome happens when an electron encounters potential barrier smaller than its kinetic energy?
A)Total reflection, no transmission
B)Momentum increase, velocity increases
C)Tunneling, partial transmission occurs✓
D)Energy loss, electron stops completely
💡 Explanation
When an electron encounters potential barrier smaller than its kinetic energy, quantum tunneling may occur because its wavefunction has nonzero probability amplitude of penetrating, even if classically forbidden. Therefore, partial electron transmission happens, rather than total reflection, or energy momentum changes which violate conservation laws.
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