Holograms: How Do They Work?
R2-D2, Princess Leia and Obi-wan Kenobi made the hologram famous a long time ago in a galaxy far, far away. Since then, holograms have become a familiar technology in many places, including the credit card in your wallet or purse.
How are they created? How do they work? Associate Professor Benjamin Klein explains in this edition of Tech+Knowledge+Y (click to view).