Holograms aren’t just for droids and dead rappers. You can make your own with a piece of transparency paper and a four-sided hologram video. Properly folded, the transparency will combine the images on a phone or tablet screen to create “a reflection that gives you the illusion of an object hovering in space,” says Alex Cronin, a physicist at the University of Arizona.


More information: http://www.popsci.com/how-to-make-smartphone-hologram

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