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Diffraction reveals wave behaviour

Diffraction reveals wave behaviour

Electron diffraction tube showing a cathode, anode, graphite foil, fluorescent screen, central spot, and diffraction rings

In an electron diffraction tube, electrons are emitted from a cathode, accelerated through a potential difference, pass through thin graphite, and hit a fluorescent screen. The bright central spot plus concentric rings are not what a simple particle-only model predicts.

Electron diffraction and de Broglie wavelength Lesson

  1. A Level
  2. /Physics
  3. /Electron diffraction and de Broglie wavelength

Step-by-step lessons covering Edexcel A Level Physics Electron diffraction and de Broglie wavelength for A Level Physics. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks across the three papers require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons