* 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 light is emitted or absorbed by molecules when they change their rotational-vibrational movements.

Infrared light is used in industrial, scientific, and medical applications.

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 light reveals the dense open cluster forming at the heart of the Orion nebula.

Infrared Data Association ( IrDA ) uses infrared light, which has a frequency below the human eye's sensitivity.

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.

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 coagulator-an intense source of infrared light in a small beam like a laser.

Tungsten-halogen lamps are frequently used as a near-infrared light source in Infrared spectroscopy.

Infrared astronomy began in the 1830s, a few decades after the discovery of infrared light by William Herschel in 1800.

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 light is absorbed at many wavelengths by water vapor in the Earth's atmosphere, so most infrared telescopes are at high elevations in dry places, above as much of the atmosphere as possible.

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.

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.

Moreover, most organic compounds absorb and emit light in the infrared ( IR ) so, for example, the recent detection of methane in the atmosphere of Mars was achieved using an IR ground-based telescope, NASA's 3-meter Infrared Telescope Facility atop Mauna Kea, Hawaii.

Image: HAWK-I Messier 100. jpg | Infrared light with the HAWK-I camera on ESO's Very Large Telescope.

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

The Spitzer Science Center ( SSC ), part of the Infrared Processing and Analysis Center located on the Caltech campus, is the data analysis and community support center for NASA's Spitzer Space Telescope.

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 is also used to observe distant, red-shifted galaxies that were formed much earlier in the history of the universe.

Infrared in general is used, for instance, in TV remotes.

Infrared technology is low-cost and has the advantage of being allowed aboard.

The high data speeds of UMTS are now most often utilised for Internet access: experience in Japan and elsewhere has shown that user demand for video calls is not high, and telco-provided audio / video content has declined in popularity in favour of high-speed access to the World Wide Web — either directly on a handset or connected to a computer via Wi-Fi, Bluetooth, Infrared or USB.

The organisation is mission center for several key current missions ( Kepler Mission, the Lunar CRater Observation and Sensing Satellite ( LCROSS ) mission, Stratospheric Observatory for Infrared Astronomy ( SOFIA )) and a major contributor to the '" new exploration focus '" as a participant in the Orion crew exploration vehicle and Ares I crew launch vehicle projects.

Stratospheric Observatory for Infrared Astronomy ( SOFIA ) is a joint venture of the U. S. and German aerospace agencies, NASA and the DLR to make an infrared telescope platform that can fly at altitudes high enough to be in the infrared-transparent regime above the water vapor in the Earth's atmosphere.

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

The Kuiper Airborne Observatory and the Stratospheric Observatory for Infrared Astronomy use airplanes to observe in the infrared, which is absorbed by water vapor in the atmosphere.

Infrared Data Association ( IrDA ) technology is a very simple form of free-space optical communications.

The Infrared Data Association ( IrDA ) is an industry driven interest group that was founded in 1993 by around 50 companies.

Satellite measurements made in 1999 with the Wide Field Infrared Explorer showed that the brightness of Altair fluctuates slightly, varying by less than a thousandth of a magnitude.

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.

The Infrared Interferometer Spectrometer ( IRIS ) team was led by Dr. Rudolf A. Hanel from NASA Goddard Spaceflight Center ( GSFC ).

The Infrared Radiometer ( IRR ) team was led by Professor Gerald Neugebauer from the California Institute of Technology ( Caltech ).

Note: A paper written by Col. Andrew Milani ( Former commander of the 160th Special Operations Aviation Regiment ) and Dr. Stephen D. Biddle entitled " Pitfalls of Technology: A Case Study of the battle of Takur Ghar " noted that the Predator was on station 90 minutes after Roberts had fallen ; the images that were shot before the Predator had arrived were shot by GRIM-32's Infrared Cameras.

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.

A picture of the Jupiter 2009 impact event blemish captured by the Keck II telescope and its NASA Infrared Telescope Facility | near-infrared camera at Mauna Kea Observatory, on July 20.

However, that possibility was ruled out by the Wide-field Infrared Survey Explorer in 2011.

* Search for Artificial Stellar Sources of Infrared Radiation, by Freeman J. Dyson

The prospect of using the Wide-field Infrared Survey Explorer was proposed by NASA officials.

Most of the time is used by the UKIRT Infrared Deep Sky Survey, but some 60 + nights per year are used by Korean institutes.