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.

This dependence on the polarizability differs from Infrared spectroscopy where the interaction between the molecule and light is determined by the dipole moment ; this contrasting feature allows to analyze transitions that might not be IR active via Raman spectroscopy, as exemplified by the rule of mutual exclusion in centrosymmetric molecules.

* Infrared Data Association, in information and communications technology, a standard for communication between devices ( such as computers, PDAs and mobile phones ) over short distances using infrared signals

Infrared satellite imagery can be used effectively for tropical cyclones with a visible eye pattern, using the Dvorak technique, where the difference between the temperature of the warm eye and the surrounding cold cloud tops can be used to determine its intensity ( colder cloud tops generally indicate a more intense storm ).

* When implementing the Infrared Data Association ( IrDA ) protocol, often an endec is used between the UART and the optoelectronics.

The prime payload for the flight, the Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere-Shuttle Pallet Satellite-2 ( CRISTA-SPAS-2 ) made its second flight on the Space Shuttle ( previous flight STS-66 in 1994 ) and was the fourth mission in a cooperative venture between the German Space Agency ( DARA ) and NASA.

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.

Infrared has significant limitations ; one being that it is line of sight only ; there had to be a clear space between the IR port and the controller.

Infrared spectroscopy has been used extensively to distinguish between isomers.

Infrared energy is continually exchanged between " hot " and " cold " surfaces until all surfaces have reached the same temperature ( equilibrium ).

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

The wavelength range between 0. 8 and 5 µm is considered as Infrared ( IR ), the frequency range between 2 and 18 GHz is considered as Radar.

* Infrared cut-off filter, designed to reflect or block mid-infrared wavelengths while passing visible light

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 spectroscopy ( IR spectroscopy ) is the spectroscopy that deals with the infrared region of the electromagnetic spectrum, that is light with a longer wavelength and lower frequency than visible light.

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.

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

Infrared and optical astronomy are often practiced using the same telescopes, as the same mirrors or lenses are usually effective over a wavelength range that includes both visible and infrared light.

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 light, rather than visible light is used more commonly, because optical fibers transmit infrared wavelengths with less attenuation and dispersion.

Infrared cut-off filters, sometimes called IR filters or heat-absorbing filters, are designed to reflect or block mid-infrared wavelengths while passing visible light.

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.

P-3C clearly showing the Magnetic anomaly detector | MAD ( tail boom ) and sonobouy chutes ( array of dark spots under rear fuselage ) while Infrared | IR sensor is retracted and not visible

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

* 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.

Infrared cut-off filters are designed to block or reflect infrared wavelengths but pass visible light.

There are two related projects: the Wide Field Camera ( WFCAM ) on the United Kingdom Infrared Telescope in Hawaii carries out infrared surveys of the northern sky, and the VLT Survey Telescope in Chile carries out surveys of the southern sky in visible light.

VIRTIS: The " Visible and Infrared Thermal Imaging Spectrometer " ( VIRTIS ) is an imaging spectrometer that observes in the near-ultraviolet, visible, and infrared parts of the electromagnetic spectrum.

Infrared lasers are particularly hazardous, since the body's protective " blink reflex " response is triggered only by visible light.

This shock has been made visible via NASA's Wide-field Infrared Survey Explorer.

Infrared cleaning works by collecting an infrared channel from the scan at the same time as the visible colour channels ( red, green, and blue ).

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 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.

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 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

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 does not travel through common glass windows and therefore microbolometers can not be used to produce images if they are behind a standard glass window and objects and details behind glass cannot be seen.