
Young's double slit
Build an interference pattern with laser light, then send photons and electrons one at a time and watch the fringes vanish when the which-path detector is switched on.
- Wave picture
- Single photons & electrons
- Role of the observer
Psiket School of Quantum Science & Technology
Virtual Quantum Lab
Pick an experiment. Each has its own tools, missions and data, and your progress is saved in this browser.

Build an interference pattern with laser light, then send photons and electrons one at a time and watch the fringes vanish when the which-path detector is switched on.

Change metal, wavelength, light power and voltage to find the emission threshold and stopping voltage, then measure Planck's constant from your own data.
More experiments soon
Particle in a box, quantum tunnelling and the Stern–Gerlach experiment are coming next.
Controls in the side column
Work through the numbered sections; every value can also be typed exactly.
2D, 3D and VR
Switch views above the bench; in 3D you can enter VR with a compatible headset.
Follow the missions
Open the progress bar at the top to see your next mission and progress.