The Double-Slit Experiment

Explore the bizarre world of quantum mechanics through an interactive simulation of the famous double-slit experiment.

Particle Source

Double Slits

Detector Screen

particles detected

Particle Rate: 10/s

Set to 1/s to watch individual particles

Particle Type

Different wavelengths → different patterns

Detector OFF → Many bands (quantum)

Show Waves Wave rings from slits Show Expected Pattern Probability curve Show Histogram Hit distribution

What you're seeing:

Click "Start" to fire particles from the source (back left) through the double slits toward the detector screen (right foreground). Watch how they accumulate into a pattern.

Learn More About Quantum Physics