The Double-Slit Experiment: When Watching Changes Reality

A single particle of light. Two slits. And the discovery that broke reality: fire photons one at a time at a wall with two slits, and they behave like waves, going through both slits at once. Watch them, and the wave pattern vanishes. In this episode of Simply Explain Science, we explain the double-slit experiment — the simplest demonstration that reality at its smallest level is a blur of possibilities that only snaps into focus when observed. Under two minutes, no jargon, just wonder.