When an electron absorbs a photon it gains enough energy to move into an outer shell where a vacancy exists if the energy of the photon is equal to the difference between the initial and final energy levels of the electron.The energy E of a photon is given by:E = hfwhere h is the Planck constant and f is the frequency of the photon.If the photon's energy is insufficient, it will not be absorbed.
Excitation Using Photons
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Specification: AQA Physics (7407), AS-level, 3.2.2.3 Energy levels and photon emission. Topic: The Photoelectric Effect.
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- De-excitation
- Fluorescence
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All 19 lessons in The Photoelectric Effect · All AQA AS-level Physics topics