HackerTube / Video
How are holograms possible?
3Blue1Brown
3Blue1Brown explains how holograms record a 3D scene on 2D film, using wave diffraction and phase. The video includes demonstrations of several real holograms.
HN commenters call it the best explanation of how holograms work, and one says it transformed their understanding.
3 Hacker News mentions · 2024–2025