Infra Red Light. We experience infrared light every time we feel the heat of the sun on our skin or the warmth of a camp fire. Technically, what we are experiencing in these instances is thermal infrared light.
Scientists call waves of electromagnetic energy that travel through space light.
We tend to think of light as only the radiant energy that we see with our eyes. But the light we can detect with our eyes is a very tiny fraction of all the types of light that exist. Infrared light is one type of light that is invisible to us. Gamma rays, X-rays, ultraviolet light, microwaves and radio waves are other types of invisible light. All of these rays and waves are the same type of electromagnetic energy.