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

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.

INFRARED definition: 1. Infrared light is a type of light that feels warm but cannot be seen: 2. Infrared light is a…. Learn more.

Feb 25, 2026 · 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 can …

Infrared radiation is simply electromagnetic radiation with a lower frequency than visible light, having longer wavelengths of 0.7 micrometer to 1 millimeter.

6 days ago · Infrared is the invisible light behind heat, remote controls, and space telescopes. Here’s what it is and why it matters.

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 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 microwaves. It is invisible to the …

Infrared radiation is similar to light but has a longer wavelength, so we cannot see it without special equipment.

1. Of or relating to electromagnetic radiation between microwaves and red visible light in the electromagnetic spectrum, having frequencies between 300 gigahertz and 400 terahertz and …