Definitions for infrared
in·frared

Princeton's WordNetRate this definition:2.9 / 7 votes

1. infrared, infrared frequencynoun

   the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range

   "they could sense radiation in the infrared"

2. infrared, infrared light, infrared radiation, infrared emissionadjective

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

3. infraredadjective

   having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end

   "infrared radiation"; "infrared photography"

WiktionaryRate this definition:3.8 / 9 votes

1. infrarednoun

   electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm

2. infraredadjective

   In the infrared spectrum.

3. infraredadjective

   Having the wavelength in the infrared.

4. Etymology: Latin infra, below, + red

WikipediaRate this definition:1.0 / 1 vote

1. Infrared

   Infrared (IR), sometimes called infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. It is therefore generally invisible to the human eye, although IR at wavelengths up to 1050 nanometers (nm)s from specially pulsed lasers can be seen by humans under certain conditions. IR wavelengths extend from the nominal red edge of the visible spectrum at 700 nanometers (frequency 430 THz), to 1 millimeter (300 GHz). Most of the thermal radiation emitted by objects near room temperature is infrared. As with all EMR, IR carries radiant energy and behaves both like a wave and like its quantum particle, the photon. Infrared radiation was discovered in 1800 by astronomer Sir William Herschel, who discovered 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 total energy from the Sun was eventually found to arrive on Earth in the form of infrared. The balance between absorbed and emitted infrared radiation has a critical effect on Earth's climate. Infrared radiation is emitted or absorbed by molecules when they change their 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, 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 overheating of electrical apparatus.Extensive uses for 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.

ChatGPTRate this definition:0.0 / 0 votes

1. infrared

   Infrared refers to a type of electromagnetic radiation with wavelengths longer than those of visible light, but shorter than radio waves. It is invisible to the human eye, but can be felt as heat. It is used in a variety of applications, including night vision equipment, thermal imaging cameras, wireless controllers and in certain medical and therapeutic treatments.

WikidataRate this definition:3.0 / 2 votes

1. Infrared

   Infrared light is electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 700 nanometres to 1 mm. This range of wavelengths corresponds to a frequency range of approximately 430 THz down to 300 GHz, and includes most of the thermal radiation emitted by objects near room temperature. Infrared light is emitted or absorbed by molecules when they change their rotational-vibrational movements. The existence of infrared radiation was first discovered in 1800 by astronomer William Herschel. Slightly more than half of the energy from the Sun arrives on Earth in the form of infrared radiation. The balance between absorbed and emitted infrared radiation has a critical effect on the Earth's climate. Infrared energy elicits 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 energy range. Infrared light is used in industrial, scientific, 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; 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 overheating of electrical apparatus.

Suggested ResourcesRate this definition:2.0 / 2 votes

1. infrared

   Song lyrics by infrared -- Explore a large variety of song lyrics performed by infrared on the Lyrics.com website.

Matched Categories

1. • Frequency

How to pronounce infrared?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say infrared in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of infrared in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of infrared in Pythagorean Numerology is: 3

Examples of infrared in a Sentence

1. Naomi Rowe-Gurney:

   The JWST gives us the ability to look at both Uranus and Neptune in a completely new way because we have never had a telescope of this size that looks in the infrared, the infrared can show us new depths and features that are difficult to see from the ground with the atmosphere in the way and invisible to telescopes that look in visible light like Hubble.

2. Professor Lattanzio:

   These include the detection of biologically relevant molecules in interstellar clouds and comets, mid-infrared spectra of interstellar grains and the dust from comets, a diverse set of data from comets including the Rosetta mission showing consistency with biology and the frequency of Earth-like or habitable planets in the Galaxy.

3. Michael Wong:

   It's kind of like a jack-o-lantern, you see bright infrared light coming from cloud-free areas, but where there are clouds, it's really dark in the infrared.

4. Sean Kirkpatrick:

   This is in the infrared, this is the heat signature off the engines in a commuter aircraft that happened to be flying in the vicinity of where those two MQ9s were at.

5. Ronald Kroger:

   It is possible that other carnivorans possess a similar infrared sense and that adds a new chapter to the story of prey-predator relationships, predator hunting strategies have to be re-evaluated and the biology of prey animals has to be revisited with body heat sensing predators in mind.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=infrared
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Infrared
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Infrared
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=infrared