Interactive Experiments
Explore the
Hands-on experiments that reveal how observation shapes reality. Fire photons, collapse wave functions, and bend time.
The Double-Slit Experiment
The most beautiful experiment in physics. Fire photons at two slits and watch an interference pattern emerge — then toggle observation to collapse it.
Richard Feynman called this experiment “the only mystery” of quantum mechanics. When unobserved, each photon behaves as a wave passing through both slits simultaneously. The moment we observe which slit it passes through, the interference pattern vanishes — reality changes based on whether we look.
Wave Function Collapse
A particle exists as a probability cloud — everywhere at once — until observed. Click to collapse the wave function and force reality to decide.
Before measurement, a quantum system exists in a superposition of all possible states, described by the wave function ψ. The act of observation forces the system into a single eigenstate — a definite position. This is the measurement problem, and it lies at the heart of Quantum Light Science.
Time Dilation
Einstein showed that time is not absolute — it stretches and compresses with velocity. Drag the slider to approach the speed of light and watch the moving clock slow down.
The Lorentz factor γ = 1/√(1 − v²/c²) describes how time dilates as velocity increases. At 87% the speed of light, time runs at half speed. At 99%, it crawls to just 14%. This is not theory — it's measured in particle accelerators and GPS satellites every day. Time is not what we thought.
The science beneath it all
These experiments hint at something deeper — a new understanding of time, light, and observation that unifies quantum mechanics and classical physics.
Discover the Science