Infrared radiation in the spectral distribution of a black body is usually considered a form of heat, since it has an equivalent temperature, and is associated with an entropy change per unit of thermal energy.

Infrared radiation is absorbed by greenhouse gases, which in turn re-radiate much of the energy to the surface and lower atmosphere.

Infrared ( IR ) light is electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 0. 74 micrometres ( µm ) to 300 µm.

Infrared sensing in snakes depends on a kind of natural thermal imaging, in which tiny packets of cellular water are raised in temperature by the infrared radiation.

Infrared ( IR ) light is electromagnetic radiation with a wavelength between 0. 7 and 300 micrometers, which equates to a frequency range between approximately 1 and 430 THz.

Infrared or red radiation from a common household radiator or electric heater is an example of thermal radiation, as is the heat and light ( IR and visible EM waves ) emitted by a glowing incandescent light bulb.

The Infrared Astronomical Satellite ( IRAS ) discovered an excess of infrared radiation coming from the star, and this was attributed to energy emitted by the orbiting dust as it was heated by the star.

Infrared astronomy is the branch of astronomy and astrophysics that studies astronomical objects visible in infrared ( IR ) radiation.

Infrared falls in between visible radiation, which ranges from 380 to 750 nanometers, and submillimeter waves.

Infrared radiation with wavelengths just longer than visible light, known as near-infrared, behaves in a very similar way to visible light, and can be detected using similar solid state devices.

* Infrared and radiation pyrometers

Infrared radiation from a specific range of wavelengths strikes the vanadium oxide and changes its electrical resistance.

* Infrared, a portion of the electromagnetic radiation spectrum

Infrared energy is just one part of the electromagnetic spectrum, which encompasses radiation from gamma rays, x-rays, ultra violet, a thin region of visible light, infrared, terahertz waves, microwaves, and radio waves.

* Infrared astronomy studies radiation with a wavelength that is too long to be visible to the naked eye but is shorter than radio waves.

Such cameras are often tuned for non-visible radiation for Infrared photography ( for night vision and heat sensing ) or X-ray ( for medical and video astronomy use ).

* Infrared astronomy deals with the detection and analysis of infrared radiation ( this typically refers to wavelengths longer than the detection limit of silicon solid-state detectors, about 1 μm wavelength ).

* Near Infrared, infrared radiation of a wavelength near that of red

Infrared homing refers to a passive missile guidance system which uses the emission from a target of electromagnetic radiation in the infrared part of the spectrum to track it.

; HIFI ( Heterodyne Instrument for the Far Infrared ): A heterodyne detector which is able to electronically separate radiation of different wavelengths, giving a spectral resolution as high as R = 10 < sup > 7 </ sup >.

Infrared homing refers to a passive missile guidance system which uses the emission from a target of electromagnetic radiation in the infrared part of the spectrum to track and follow it.

* Infrared vision, a capability of detecting infrared radiation

Infrared radiation with wavelengths between 7. 5-14 μm strikes the detector material, heating it, and thus changing its electrical resistance.

In some areas, emergency responders are provided with specialized equipment, such as an Mobile Infrared Transmitter, which allows emergency response vehicles, particularly fire fighting apparatus, to have high-priority travel by having the lights along their route change to green.

Infrared bow shocks travel at hundreds of kilometers per second, heating gas to hundreds or even thousands of kelvins.

Infrared and terahertz-wave cameras are capable of creating images through clothing, though these images differ from what would be created with visible light.

* Infrared Illumination ( IR ): Produces illumination which is only visible through the use of night vision devices.

# Infrared Illumination ( IR ): Produces illumination which is only visible through the use of night vision devices.

The AAOmega data will be used in conjunction with observations from satellite observatories ( e. g. Herschel Space Observatory ) and other telescopes around the world ( e. g. the European Southern Observatory's Visible and Infrared Survey Telescope, VISTA ) to critically examine the predictions of the Cold Dark Matter standard cosmological model e. g. the relationship between the number density of dark matter halos and their masses and the relationship between the number density of galaxies and their masses as determined through studying their starlight.

However, SPICAV has an additional channel known as SOIR ( Solar Occultation at Infrared ) that will be used to observe the Sun through Venus's atmosphere in the infrared.

The Space-Based Infrared System ( SBIRS ) is a consolidated system intended to meet the United States ' infrared space surveillance needs through the first two to three decades of the 21st century.

Multiplayer functionality is achieved through Infrared, Bluetooth, GPRS, 3G, Wi-Fi, AI, MMS, or Wireless LAN connection.

Infrared is invisible and travels in straight lines from the heat source to surfaces and objects without significantly heating the space ( air ) it passes through.

All carbon present converts to carbon dioxide, flows through scrubber tubes to remove interferences such as chlorine gas, and water vapor, and the carbon dioxide is measured either by absorption into a strong base then weighed, or using an Infrared Detector.

Infrared radiation enters through the front of the sensor, known as the ' sensor face '.

IRR coating is applied to all fabric and webbing, which reduces its signature when viewed through Infrared night vision systems to that of foliage.

* Infrared spectroscopy and Raman spectroscopy are other common spectroscopic techniques, usually used to obtain information about the structure of compounds or to identify compounds.

Infrared and red laser diodes are common in CD players, CD-ROMs and DVD technology.

Infrared and ultraviolet-visible spectroscopy are particularly common in analytical applications.

The measurements can be made with various instruments, including a task specific spectrometer, although the most common method is separation of the Red, Green, Blue and Near Infrared portion of the EM spectrum as acquired by digital cameras.

Infrared thermography color thermal imaging cameras ( used in formal energy audits ) can quickly document the negative thermal impact of roof-angled glass or a skylight on a cold winter night or hot summer day.