Word: infra
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...physical bodies emit heat in the form of infra-red rays invisible to the human eye. Out of this simple scientific fact has grown an exciting and important new industry that is already big in missile and space work. Unlike more familiar uses of infra-red-which use it as a heat source to cook foods quickly-the new applications need supersensitive detection equipment to receive infra-red and "see" the source it comes from. Infra-red detection now adds a new dimension to sight...
Unlimited Horizon. Detection by infra-red can perform incredible feats. A person can put his hand against a wall for a short time, and an infra-red camera taking a picture of the other side of the wall will later pick out the imprint of the hand. The temperature of the moon can be easily measured. Scientists are experimenting to see if infra-red can detect the presence of cancer by changes in skin temperature. Although infra-red was developed primarily for the military and to guide and track missiles, detect camouflage and take aerial photographs through fog, other uses...
...aircraft and off the ground to determine an approaching aircraft's course, tells the pilot what evasive action to take. The Sperry Rand Corp. is developing a system that uses high-frequency radio-wave techniques to detect the proximity of another aircraft; Motorola, Inc. is working on an infra-red detection device that picks up the red running lights on other planes, warns the pilot of their nearness...
...primary mission was another step in the perfection of two space-age military reconnaissance techniques: the Samos system for camera detection of such ground-level activity as troop movements, and the Midas early missile-warning system, which is said to detect rocket firings anywhere on earth by means of infra-red sensors...
Tiros II has five detectors that measure different kinds of infra-red radiation coming up from the earth. They are working splendidly, and their reports will give new information about the earth's albedo (reflectivity) and about the temperature and humidity of the upper layers of the atmosphere. This sort of data is precious to meteorologists...