About

An interactive 3D web application that visualises the quantum double-slit experiment.

Users fire photons or electrons at a barrier with two slits and watch an interference pattern build on a detection screen. Four features combine to create a unique educational tool that no competitor offers together.

[Particle Source] —→ [Barrier with 2 Slits] —→ [Detection Screen]

▶ Try the interactive demo Timeline • Observer • 360° camera

Who it's for

A-level physics students

Ages 16–18. The double-slit experiment is a core required practical across AQA, OCR, Edexcel, and WJEC exam boards.

Teachers

25% of English state schools have no specialist physics teacher. Double Slit scaffolds understanding for non-specialists.

KS3 / KS4 students

Ages 11–16. Scaffolded introductory modes introduce basic wave behaviour and the photon model.

Science museums

Self-contained 2–4 minute interaction cycles for walk-up visitors. Museum mode with large touch targets.

44,947 A-level physics entries in 2025 5,877 secondary schools in England

Benefits

Built for UK schools

Runs on school Chromebooks (Intel Celeron N4500, 4GB RAM). Adaptive quality keeps 30fps on low-end hardware.

Advanced 3D simulation compared with flat lab visuals

Beyond PhET

PhET dominates with 1.7B runs but is entirely 2D. Double Slit adds timeline scrubber, observer toggle, and full 3D rendering.

Inclusive, standards-aligned digital learning

Compliant & accessible

ICO Children's Code, WCAG 2.2 AA, cookieless analytics. No engagement loops or gamification.

Shareable states

Teachers share experiment URLs with exact parameters. Deep links for classroom distribution.

Scroll — trace connects each feature

Features

01

Timeline Scrubber

Drag through time to watch particles accumulate dot by dot, or rewind to see fewer. All trajectories pre-computed; the timeline controls visibility.

02

Observer Toggle

When "observing," the interference pattern collapses to two classical bands. Toggle off and the wave pattern returns. The "wow" moment — students see wave function collapse in real time.

03

360° Orbital Camera

Full OrbitControls: rotate, zoom, pan around the experiment like a physics bench. Keyboard alternatives for every mouse action.

04

Adjustable Parameters

Slit width, slit separation, wavelength (changes particle colour), emission rate, distance to screen. Real-time tweaking.

Try demo

Interactive 3D Quantum Experiment

About