Infrared radiation is used in industrial, scientific, and medical applications. Night-vision devices using active near-infrared illumination allow people or animals to be observed without the observer being detected. Infrared astronomy uses sensor-equipped telescopes to penetrate dusty regions of space, such as molecular clouds; detect objects such as planets, and to view highly red-shifted objects from the early days of the universe. Infrared thermal-imaging cameras are used to detect heat loss in insulated systems, to observe changing blood flow in the skin, and to detect overheating of electrical apparatus. COUNT 5
QSN1 What technology is used by night-vision devices? ANS1 active near-infrared illumination QSN2 What discipline uses infrared telescopes to see through molecular clouds? ANS2 Infrared astronomy QSN3 What color shift indicates that space objects date from the early days of the universe? ANS3 red QSN4 What devices are used to observe insulated system heat loss? ANS4 Infrared thermal-imaging cameras QSN5 Along with industrial and medical, in what applications is infrared radiation used? ANS5 scientific