Skip to main content

IR is electromagnetic radiation with wavelengths from about 750 nm to 1000 µm, which is beyond the nominal red edge of the visible spectrum.

Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) in the spectral band between microwaves and visible light (the nominal red edge of the visible spectrum). It is invisible to the human eye.

IR is generally understood to encompass wavelengths from around 750 nm to 1000 μm (400 THz to 300 GHz).

(From: Wikipedia)