Context: 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.

Question: Along with industrial and medical, in what applications is infrared radiation used?
Answer: scientific

Question: What technology is used by night-vision devices?
Answer: active near-infrared illumination

Question: What discipline uses infrared telescopes to see through molecular clouds?
Answer: Infrared astronomy

Question: What color shift indicates that space objects date from the early days of the universe?
Answer: red

Question: What devices are used to observe insulated system heat loss?
Answer: Infrared thermal-imaging cameras

Question: What technology allows infrared thermal imaging cameras to observe people or animals without being detected?
Answer: Unanswerable

Question: What technology is used by night vision devices to observe changing blood flow in the skin?
Answer: Unanswerable

Question: What science discipline uses infrared thermal-imaging cameras to penetrate dusty regions of space?
Answer: Unanswerable

Question: Along with industrial and medical, in what applications is infrared astronomy used?
Answer: Unanswerable

Question: What type of radiation is used to detect heat loss in insulated systems?
Answer: Unanswerable