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  1. Dictionary
    infrared
    /ˌɪnfrəˈrɛd/

    adjective

    • 1. (of electromagnetic radiation) having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves. Infrared radiation has a wavelength from about 800 nm to 1 mm, and is emitted particularly by heated objects.

    noun

    • 1. the infrared region of the spectrum; infrared radiation.

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  2. 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

  3. dictionary.cambridge.org › dictionary › englishINFRARED | English meaning - Cambridge Dictionary

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

  4. byjus.com › physics › infrared-radiationWhat Is Infrared Radiation (IR(? Wavelength, Frequency, Uses,...

    Infrared radiation (IR), sometimes known as infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. Hence, it is undetectable by the human eye, although IR of wavelengths up to 1050 nanometers (nm) from specially pulsed lasers can be seen by humans under certain conditions.

  5. www.britannica.com › science › infrared-radiationInfrared radiation | Definition, Wavelengths, & Facts |...

    Jun 25, 2024 · 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.

  6. www.merriam-webster.com › dictionary › infraredInfrared Definition & Meaning - Merriam-Webster

    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. How to use infrared in a sentence.

  7. www.livescience.com › 50260-infrared-radiationWhat Is Infrared? | Live Science

    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,...

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

    Aug 16, 2013 · 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 the Sun on a summer day, or the soft glow of a light bulb at night.

  9. opticsmag.com › what-is-infrared-radiationWhat Is Infrared Radiation? Science-Based Facts & FAQ

    Mar 14, 2024 · A type of electromagnetic radiation 2, infrared radiation occurs on the electromagnetic spectrum and is produced when atoms absorb and release energy. This spectrum includes X-rays, gamma rays, ultraviolet radiation (sunlight), visible light, microwaves, radio waves, and infrared waves.

  10. dictionary.cambridge.org › us › dictionaryINFRARED | definition in the Cambridge English Dictionary

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

  11. simple.wikipedia.org › wiki › InfraredInfrared - Simple English Wikipedia, the free encyclopedia

    Infrared (IR) radiation is a type of electromagnetic radiation (a wave with electricity) . The wave is longer than light which humans can see and shorter than microwaves . The word infrared means below red .