Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves.

Dec 18, 2025 · Infrared radiation, that portion of the electromagnetic spectrum that extends from the long wavelength, or red, end of the visible-light range to the microwave range. Invisible to the eye, it …

Mar 19, 2025 · Learn about infrared light or infrared radiation. Get the definition, wavelength and frequency range, and interesting facts.

The meaning of INFRARED is situated outside the visible spectrum at its red end —used of radiation having a wavelength between about 700 nanometers and 1 millimeter.

Aug 10, 2016 · Infrared waves have longer wavelengths than visible light and can pass through dense regions of gas and dust in space with less scattering and absorption. Thus, infrared energy can also …

Aug 16, 2013 · What is Infrared? Infrared is a form of light... light that we can not see with our eyes, but that we can sometimes feel on our skin as heat. When we think of light, we may imagine the glare of …

Mar 14, 2024 · Infrared is a type of energy on the electromagnetic spectrum. Invisible to the human eye, infrared energy is given off by all heat sources. Discovered in 1800 by William Herschel, infrared can …

Oct 8, 2025 · Infrared light lies in the invisible light spectrum between red light and microwave radiation. There are three main types of infrared light: near-infrared, mid-infrared, and far-infrared.

Infrared is invisible (under special conditions our eyes can see a little into infrared but not well). So why do hot things glow? Because they are also sending out light: (Note: flames can also have special …

Infrared radiation was discovered by William Herschel in 1800. He was studying the heating effect of different colours of light by using a prism to produce a spectrum of colours and thermometers to …