Infrared can be divided into three separate categories - near, mid, and far, and even though we can't see it, in some cases we can detect it. Many things, including people and planets, emit infrared. We also use it to transmit information via remote controls and video game consoles.

Originally released by National Science Foundation, 2011. Streaming video file encoded with permission for digital streaming by Infobase on May 05, 2015.

Infrared: Chalk Talk (1:00); .