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  1. en.wikipedia.org › wiki › InfraredInfrared - Wikipedia

    Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with waves that are just longer than those of red light (the longest waves in the visible spectrum ), so IR is invisible to the human eye.

  2. 3 days ago · 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 be detected as a sensation of warmth on the skin.

    • The Editors of Encyclopaedia Britannica
  3. Aug 10, 2016 · Learn what infrared waves are, how they were discovered, and how they are used to study the universe and the Earth. Find out how infrared waves can be detected as heat, seen through dust, and monitored by satellites.

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  4. 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 radiation,...

  5. coolcosmos.ipac.caltech.edu › page › what_is_infraredWhat is Infrared? | Cool Cosmos

    Aug 16, 2013 · Learn about infrared light, a form of light that we can not see but that we can feel as heat. Discover how infrared light is related to temperature, color, and the electromagnetic spectrum, and how astronomers use it to study the cool cosmos.

  6. Mar 14, 2024 · Infrared is a form of light that is just beyond the red end of the visible light spectrum. It is invisible to the human eye but is emitted by all objects. Using sensors and receivers, it is possible to view the infrared emitted by different objects, making it useful for night vision and in fields such as astronomy.