
Image credit: NASA/ESA/ESO
The holographic principle uses the optical concept of holograms to try to visually explain the complex idea. Holograms are most often used on credit cards and are images that look three dimensional, but they exist on a two dimensional surface. "You have to keep in mind that we're just using that name as a sort of metaphor for something that we're specifying quite precisely when we're talking about how much information there is relative to certain areas," he said.