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Summary

Summary Photoelectric effect and the gold leaf experiment

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  • Course
  • AS Unit G482 - Electrons, Waves and Photons
  • Institution
  • OCR

This document gives a quick summary of the photoelectric effect and the gold leaf experiment. The document is not very long and doesn't have much information overall so it didn't feel right putting a price on it :)

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Document information

  • January 12, 2022
  • 1
  • 2020/2021
  • Summary

Subjects

  • photoelectric
  • physics experiment
  • photoelectric effect
  • gold leaf experiment
  • physics

Written for

  • A/AS Level
  • OCR
  • Physics A
  • AS Unit G482 - Electrons, Waves and Photons
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Content preview

What is the photoelectric effect?
When UV radiation is shone onto zinc, electrons were emitted from the surface
of the metal. This is the photoelectric effect.
The photoelectric effect occurs when electromagnetic radiation incident on the
surface of a metal causes electrons to be emitted


What is the gold leaf experiment?
The gold leaf experiment can demonstrate the photoelectric effect.
Touching the top plate with the negative electrode from a high-voltage power
supply will charge the electroscope. Excess electrons are deposited onto the
plate and stem of the electroscope. Any charge developed on the plate at the
top of the electroscope spreads it to the stem and the gold leaf. As both the
stem and the gold leaf have the same charge, they repel each other, and the
leaf lift away from the stem. If a clean piece of zinc is placed on top of a
negatively charged electroscope and UV radiation shines onto the zinc surface,
then the gold leaf falls slowly back towards the stem

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