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Quantum Wave Interference
|When do photons, electrons, and atoms behave like particles and when do they behave like waves? Watch waves spread out and interfere as they pass through a double slit, then get detected on a screen as tiny dots. Use quantum detectors to explore how measurements change the waves and the patterns they produce on the screen.|
- Quantum Mechanics
Sample Learning Goals
- Visualize a photon, electron, neutron, or helium atom as a wave packet that collapses upon detection.
- Visualize what happens to the wave between slit and screen.
- Justify how the double slit experiment explains that matter and light behave as waves.
- Describe the behavior of a wave function in the presence of a detector, and explain how putting a detector over a slit destroys the interference pattern. Determine how the interference pattern will change if you change the mass, speed, or wavelength.
- Recognize large range of size scales involved in quantum interference experiments.
- Recognize that two coherent light sources can interfere, but only if they have the same wavelength.
Tips for Teachers
The teacher's guide (pdf) contains tips created by the PhET team.
|Visualization and Visual Illusions SIM Homework||Kathy Perkins, Carl Wieman||UG-Intro||HW||1/9/11|
|Probability and Randomness Interactive Lecture||Sam McKagan, Kathy Perkins, Carl Wieman, and Noah Finkelstein||UG-Adv
|Wave Particle Duality||Sam McKagan, Kathy Perkins, and Carl Wieman||UG-Intro
|The Two-Slit Experiment||Roberta Tevlin||HS||CQs
You can submit your own ideas and activities.
Sun Java 1.5.0_15 or later
OS 10.5 or later
Sun Java 1.5.0_19 or later
|Sun Java 1.5.0_15 or later|
|Design Team||Third-party Libraries||Thanks To|
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