What does infrared radiation mean?

Definitions for infrared radiation
in·frared ra·di·a·tion

This dictionary definitions page includes all the possible meanings, example usage and translations of the word infrared radiation.

Princeton's WordNet

  1. infrared, infrared light, infrared radiation, infrared emissionnoun

    electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves


  1. Infrared Radiationnoun

    electromagnetic radiation having a wavelength of between 700 nanometers and 1 millimeter. Infrared radiation is that electromagnetic radiation lying between the visible spectrum and the longest microwaves. It may be absorbed by matter in a manner specific to the absorbing substance, causing increased vibration of molecules. The infrared absorption spectrum of a chemical compound is often very specific, and the infrared absorption spectrum is therefore used to help identify chemical substances. Infrared radiation is used in certain communication devices, such as television remote controls and communication devices between computers or between computers and peripherals.


  1. infrared radiationnoun

    Electromagnetic radiation having a wavelength approximately between 1 micrometre and 1 millimetre; perceived as heat.


  1. Infrared radiation

    Infrared (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light and shorter than radio waves. It is therefore invisible to the human eye. IR is generally understood to encompass wavelengths from around 1 millimeter (300 GHz) to the nominal red edge of the visible spectrum, around 700 nanometers (430 THz). Longer IR wavelengths (30 μm-100 μm) are sometimes included as part of the terahertz radiation range. Almost all black-body radiation from objects near room temperature is at infrared wavelengths. As a form of electromagnetic radiation, IR propagates energy and momentum, exerts radiation pressure, and has properties corresponding to both those of a wave and of a particle, the photon. It was long known that fires emit invisible heat; in 1681 the pioneering experimenter Edme Mariotte showed that glass, though transparent to sunlight, obstructed radiant heat. In 1800 the astronomer Sir William Herschel discovered that infrared radiation is a type of invisible radiation in the spectrum lower in energy than red light, by means of its effect on a thermometer. Slightly more than half of the energy from the Sun was eventually found, through Herschel's studies, to arrive on Earth in the form of infrared. The balance between absorbed and emitted infrared radiation has an important effect on Earth's climate. Infrared radiation is emitted or absorbed by molecules when changing rotational-vibrational movements. It excites vibrational modes in a molecule through a change in the dipole moment, making it a useful frequency range for study of these energy states for molecules of the proper symmetry. Infrared spectroscopy examines absorption and transmission of photons in the infrared range.Infrared radiation is used in industrial, scientific, military, commercial, and medical applications. Night-vision devices using active near-infrared illumination allow people or animals to be observed without the observer being detected. Infrared astronomy uses sensor-equipped telescopes to penetrate dusty regions of space such as molecular clouds, to detect objects such as planets, and to view highly red-shifted objects from the early days of the universe. Infrared thermal-imaging cameras are used to detect heat loss in insulated systems, to observe changing blood flow in the skin, and to detect the overheating of electrical components.Military and civilian applications include target acquisition, surveillance, night vision, homing, and tracking. Humans at normal body temperature radiate chiefly at wavelengths around 10 μm (micrometers). Non-military uses include thermal efficiency analysis, environmental monitoring, industrial facility inspections, detection of grow-ops, remote temperature sensing, short-range wireless communication, spectroscopy, and weather forecasting.


  1. infrared radiation

    Infrared radiation is a type of electromagnetic radiation with wavelengths longer than visible light but shorter than microwave radiation. It is invisible to the human eye, but we can feel it as heat. It is emitted by all objects with a temperature above absolute zero, and is used in many technological applications, such as thermal imaging, heating, and wireless communication.

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How to pronounce infrared radiation?

How to say infrared radiation in sign language?


  1. Chaldean Numerology

    The numerical value of infrared radiation in Chaldean Numerology is: 9

  2. Pythagorean Numerology

    The numerical value of infrared radiation in Pythagorean Numerology is: 4

Translations for infrared radiation

From our Multilingual Translation Dictionary

  • அகச்சிவப்பு கதிர்வீச்சுTamil
  • ఇన్ఫ్రారెడ్ రేడియేషన్Telugu
  • kızılotesi radyasyonTurkish

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"infrared radiation." Definitions.net. STANDS4 LLC, 2023. Web. 28 Nov. 2023. <https://www.definitions.net/definition/infrared+radiation>.

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