Phet Diffraction

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Simulate the original experiment that proved that electrons can behave as waves. Watch electrons diffract off a crystal of atoms, interfering with themselves to create peaks and troughs of probability.

Make waves with a dripping faucet, audio speaker, or laser! Add a second source to create an interference pattern. Put up a barrier to explore single-slit diffraction and double-slit interference. Experiment with diffraction through elliptical, rectangular, or irregular apertures. Virtual lab for Waves: Interference and Diffraction of Water, Sound, and Light Waves. This video explains the theory required to perform the lab and walks yo. Phet Wave Interference Answers Make waves with a dripping faucet, audio speaker, or laser! Separation in the interference pattern? On a screen 1.25m away. Interference - the combination of two or more waves to form a resultant wave in which the displacement is either reinforced or canceled.

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TopicsTeaching IdeasSoftware RequirementsTranslated VersionsCredits

Main Topics

  • Electron Diffraction

Related Topics

  • Electron Diffraction, Energy Levels, Atomic Structure, Interference, Electrons, Wave-Particle Duality

Sample Learning Goals

  • Recognize that electrons are reflected from a lattice mostly at certain angles due to wave interference.

Tips for Teachers

The teacher's guide contains tips for teachers created by the PhET team (PDF).

Ideas and Activities for this Sim

There is 1 contribution listed.

S. McKaganUG-Intro

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Windows Systems Macintosh Systems Linux Systems
Microsoft Windows 98SE/2000/XP/Vista
Sun Java 1.5.0_15 or later
OS 10.4 or later
Apple Java 1.5.0_19 or later
Sun Java 1.5.0_15 or later

Phet Diffraction Analysis

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Phet Simulation Diffraction

Design Team Third-party Libraries Thanks To
  • Sam McKagan (lead)
  • Kathy Perkins
  • Sam Reid (developer)
  • Carl Wieman
  • Interviewer: Sam McKagan