Physics A-Level
Quantum tunnelling
What Quantum tunnelling means in Physics A-Level, as defined for AQA.
Definition of Quantum tunnelling
Check what you remember
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Reference: AQA
Electrons can cross the gap between a very sharp metal tip and a conducting surface when a small potential difference is applied.
Topics that use Quantum tunnelling
- Electron microscopes (A-level only) (AQA A-Level)
Related terms
- de Broglie wavelength of electrons
- Energy conservation in electron acceleration
- Feedback control systems
- Order-of-magnitude estimation in physics
- Resolution limits of electron microscopes
- Resolution limits of microscopes
- Specimen preparation and vacuum requirements
- Wave-particle duality and the de Broglie wavelength
Using Quantum tunnelling in the exam
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