BRAINCAKEDe-excitation
The excited state of the electron is unstable.
The vacancy in the inner shell is filled by an outer shell electron.
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Key terms in this lesson
- Photon
- A discrete packet, or quantum, of electromagnetic energy.
- Excitation
- The process by which an electron in an atom gains energy and moves to a higher, unoccupied energy level.
More in The Photoelectric Effect
- Measuring Ionisation Energy
- Energy of Electrons
- Electron Excitation by Collisions
- Excitation Using Photons
- Fluorescence
- Fluorescent Tube
- Line Spectra
- Excitation of Hydrogen Atoms
All 19 lessons in The Photoelectric Effect · All AQA AS-level Physics topics