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Edexcel A-Level Physics AS 2.3.53 Electron Diffraction Evidence Questions

Practise Edexcel IAL Physics 2.3.53 by interpreting graphite-ring diffraction or interference and linking electron wave behaviour to de Broglie wavelengths comparable with atomic spacing.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
AS

Exam points

  • explain graphite-ring patterns as electron diffraction or interference evidence
  • link electron diffraction to wave behaviour and de Broglie wavelength comparable to atomic spacing

Edexcel A-Level Physics AS 2.3.53 Electron Diffraction Evidence Questions question 1

[Maximum number: 2]

A beam of electrons passes through a thin layer of graphite. The electrons are then incident on a fluorescent screen, causing a series of rings to form, as shown.
beam of electrons

Figure for Question Edexcel A-Level Physics AS 2.3.53 Electron Diffraction Evidence Questions question 1 — Edexcel A-Level Physics AS

Explain what the rings show about the nature of electrons.

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