ELI5: Explain Like I'm 5

Fog display

Have you ever seen a foggy morning when the mist is hovering close to the ground? Well, now imagine that mist is not just any ordinary mist, but a special kind of mist that can display images and videos. That's what a fog display is all about.

It works like this: inside a fog display machine, there is a chamber filled with a thick fog. This fog is made by mixing water and glycerin or mineral oil. The machine then forces this mist out in a controlled manner using a nozzle or a fan.

The mist is projected onto a screen or a surface where the images and videos are displayed. The screen could be anything from a flat surface to a three-dimensional object, even a balloon!

The secret sauce to the fog display is the way light interacts with the fog. The particles in the fog scatter the light, making it appear optically dense. The result is that when an image or video is projected onto the fog, it appears to be floating in mid-air.

One of the best things about fog displays is that they're interactive. It's possible to use sensors to detect movement and interact with the display. For example, imagine playing a video game where the characters appear to be moving in 3D space around you.

In conclusion, a fog display is a machine that uses a special kind of mist that can display images and videos in mid-air, creating the illusion of floating images that you can interact with. It's pretty cool!
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