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Waves, sound and light

Physics

After this lesson, you should be able to:

  • Describe the photoelectric effect as the emission of electrons from a metal surface when light shines on it
  • Understand the significance of the photoelectric effect as supporting the particle theory of light
  • Define the terms cut-off frequency and work-function
  • Apply the photoelectric equation to solve a variety of problems and to predict whether electrons may be ejected