Quantum Mechanics: The Double-Slit Experiment
Light and electrons: both waves and particles
0:54 · 720p · With AI narration and captions. This sample was made with the same system as this service.
Narration (full text)
Click a time to play from that scene.
Double-Slit Experiment
Let's look at the double-slit experiment, which sends light or electrons through two narrow slits.
Stripes of Light
Shine light through two narrow slits, and bright and dark stripes line up on the screen.
Spreading Waves Overlap
It forms when waves from the two slits interfere, which is a property of waves.
Electrons One at a Time
Fire electrons one at a time, and each one hits a single spot on the screen, like a particle.
When Many Pile Up
But as more and more pile up, interference stripes appear, just like with light.
Checking Which Slit
If you check which slit it took, the stripes vanish, leaving two bands.
Wave-Particle Duality
Electrons hit like particles but interfere like waves. Having both of these natures is called wave-particle duality.
Both a Wave and a Particle
Electrons have the properties of both waves and particles.
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