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10 Cards in this Set
- Front
- Back
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The photoelectric effect |
If light of a high enough frequency is shone onto the surface of a metal, and electrons absorb enough energy to break the bonds holding them there, then photoelectrons are released. |
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Work function |
The energy required by an electron to be released from the surface of a metal |
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Threshold frequency |
The minimum frequency of light required to release electrons from the surface of a metal |
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Light intensity |
the number of photons per second on an area |
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Stopping potential |
The potential difference required to stop the fastest moving electrons |
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Ground state |
Lowest energy state of an atom |
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Excitation |
Movement of an electron to a higher energy level |
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Ionisation |
When an electron is removed from an atom |
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Ionisation energy |
Amount of energy required to completely remove an electron from the atom from the ground state |
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Interference and diffraction patterns |
Alternating bands of dark and light |
