Light can also be used in communication. I’m not talking about using flashlights to talk to your friends in Morse code, I mean fiber optics. Most telephone and internet companies are switching their land lines over to fiber optics because it needs less energy. Fiber optics are thin, flexible tubes made out of a special kind of clear plastic that traps light inside of it. Have you ever seen one of those lamps with lots of thin tubes spreading out of it in a tree shape? And each tube glows at the tip? Well, those are fiber optic tubes.

Fiber optics, like I mentioned above, are used mainly in long-range communication. But people have found many ways to use them. For example, in places where light bulbs and such won’t fit, like micro surgery, doctors use fiber optics for light sources and video feeds. Fiber optics are also commonly used in decorations and rarely used in clothing. They are woven into pants, shirts, or even pillows as changeable designs, or can be twisted into glowing knots. There are a lot of other uses, I’m sure, but I can’t think of any.