Hiding Images in Plain Sight

An Article by Matt Ferraro
Image from mattferraro.dev on 2021-08-24 at 7.29.32 PM.jpeg

I recently made a physical object that defies all intuition. It's a square of acrylic, smooth on both sides, totally transparent. A tiny window.

But it has the magic property that if you shine a flashlight on it, it forms an image.