- infraorbital canal,
- infraorbital foramen,
- infraorbital nerve,
- infrared astronomy,
- infrared galaxy,
- infrared microscope,
- infrared photography,
- infrared radiation
Origin of infrared
Examples from the Web for infrared
Therefore, it is not possible for any F-35 schedule to include a video data link or infrared pointer at this point.
Some pilots consider the infrared marker to be crucial to the close air-support mission to support ground troops.Newest U.S. Stealth Fighter ‘10 Years Behind’ Older Jets|Dave Majumdar|December 26, 2014|DAILY BEAST
Infrared light does not have a color which means it cannot be seen by the human eye.
Unlike humans, it can watch for days, even years, watch an entire city, zoom in close, use heat sensors and infrared.
Helicopters equipped with infrared equipment flew over the area.
He switched out the infrared light, placing the camera on the ground, pointing toward the boat landing.
Candles or torches didn't cast enough light to penetrate the blackness as the infrared beam did.
His eye found the telescope and he pressed the infrared switch.Smugglers' Reef|John Blaine
Thanks to the goggles, both of them could see the normally invisible beams of the infrared flashlight.Out Like a Light|Gordon Randall Garrett
It boils liquid metal and cooks out energy from the infrared right through to hard radiation.The K-Factor|Harry Harrison (AKA Henry Maxwell Dempsey)
A Closer Look
In 1800 the astronomer Sir William Herschel discovered infrared light while exploring the relationship between heat and light. Herschel used a prism to split a beam of sunlight into a spectrum and then placed a thermometer in each of the bands of light. When he placed the thermometer just outside the red band, where there was no visible color, the temperature rose, as if light were shining on the thermometer. Further experiment showed that this invisible radiation behaved like visible light in many ways; for example, it could be reflected by a mirror. Infrared radiation is simply electromagnetic radiation with a lower frequency than visible light, having longer wavelengths of 0.7 micrometer to 1 millimeter. Ultraviolet radiation, like infrared radiation, lies just outside the visible part of the spectrum, but with higher frequencies; some animals, such as bees, are capable of seeing such radiation. Both infrared and ultraviolet radiation are often referred to as forms of light, though they cannot be seen by human beings. Heat energy is often transferred in the form of infrared radiation, which is given off from an object as a result of molecular collisions within it. Molecules typically have a characteristic infrared absorption spectrum, and infrared spectroscopy is a common technique for identifying the molecular structure of substances. Astronomers similarly analyze the infrared radiation emitted by celestial bodies to determine their temperature and composition.