IB Physics E2 Definitions
This page contains our IB Physics definitions for E2. By learning each one of these definitions, you will fully cover the content for IB Physics 'Quantum physics'.
Photoelectric effect
It is the emission of electrons from a metal surface when UV light shines on it
Quantum tunnelling
It is a particle's ability to escape its potential barrier without sufficient energy
Stopping potential
It is the voltage at which there is no electron emission
Threshold frequency
It is the frequency of absorbed photon below which no electron is emitted
Wave-particle duality
It is the property of sometimes behaving as a wave and sometimes behaving as a particle
Work function
It is the minimum energy that electrons need to escape the metal surface
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