Check out the physics courses that I mentioned (many of which are free!) and support this channel by going to https://brilliant.org/Sabine/ where you can create your Brilliant account. The first 200 will get 20% off the annual premium subscription. Is the universe a hologram, a projection of a higher-dimensional space? String theorists think it is. How does a hologram work, what is the holographic principle, and what do they have in common? I will explain all that in this video. Want to make your own holograms? There's a Kickstarter project for a 3D hologram printer here https://www.kickstarter.com/projects/752525344/the-first-desktop-3d-hologram-printer-by-litiholo For more information, see http://www.litiholo.com/3d-hologram-printer.html Want to see more videos like this? Support us on Patreon: https://www.patreon.com/Sabine #science #physics #education 0:00 Intro 0:16 What is a hologram? 2:02 How do holograms work? 5:40 The holographic principle 8:41 Optical holography vs the holographic principle 9:55 Sponsor message