Infrared is a form of energy best thought of as waves moving through space that has different frequencies. From low frequencies, which make up radio waves, to high frequencies such as gamma or X-rays, with the visible spectrum of light our eyes can detect (from violet through to red), somewhere in the middle. Infrared (Latin for ‘below red’) is a form of radiation found just below visible light on the electromagnetic spectrum. When we absorb infrared, the only effect is that we feel warmer. However, IR can be hazardous with prolonged exposure.