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 …

Mar 19, 2025 · Infrared light, also called infrared radiation or IR waves, is a type of electromagnetic radiation with wavelengths longer than visible light but shorter than …

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.

Feb 27, 2019 · Infrared radiation (IR), or infrared light, is a type of radiant energy that's invisible to human eyes but that we can feel as heat. All objects in the universe emit some level of IR …

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 …

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 …

Nov 26, 2025 · Infrared (IR) radiation is a form of energy that is invisible to the human eye. It is an electromagnetic wave intimately linked with the sensation of heat, making it a primary …

Jun 9, 2022 · What Is Infrared? Infrared radiation — often referred to simply as infrared or IR — is a type of invisible energy that lies just beyond the red end of the visible light spectrum. …

Jul 13, 2021 · WHAT IS INFRARED? Infrared radiation, also referred to as infrared light or infrared waves, is a form of energy with frequency and wavelengths just below the visible light …