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Electromagnetic radiation and quantum phenomena

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Question 12

Monochromatic radiation is incident on a metal plate in a vacuum, causing photoelectrons to be emitted. The wavelength of the incident radiation is now decreased, whilst keeping the total power incident on the metal surface constant. The frequency of the radiation remains above the threshold frequency of the metal.

Explain the effect of this change on:

  • the maximum kinetic energy, Ek(max)E_{k(\text{max})}Ek(max)​, of the emitted photoelectrons,
  • the photoelectric current, III.
[4]
Markscheme

Electromagnetic radiation and quantum phenomena Questions

  1. A Level
  2. /Physics
  3. /Electromagnetic radiation and quantum phenomena

31 exam-style questions on AQA A Level Physics Electromagnetic radiation and quantum phenomena, covering The photoelectric effect, Collisions of electrons with atoms, Energy levels and photon emission, and Wave-particle duality. Each one has a worked solution and a mark scheme showing where the marks go.

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