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Physics unit 3
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Physics unit 3
The effect consists of the emission of electrons from a metal surface when electromagnetic waves of a high enough frequency are incident on the surface.
- What actually happened
- No emission when the frequency of light was low
- Photoelectrons emitted with a variety of kinetic energy. This increases with frequency but unaffected by intensity
- Number of photoelectrons emitted per second is proportional to intensity.
- According to wave theory
- So the higher the intensity of the wave the more energy it should transfer to each electron – the kinetic energy should increase with intensity.
- Intensity is the power hitting a given area of the metal.
- So the higher the intensity of the wave the more energy it should transfer to each electron – the kinetic energy should increase with intensity.
- What actually happened
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- Mind Map on Physics unit 3, created by Sam Blyth on 11/01/2018.
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- Sam Blyth
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