Infrared tracking, also known as infrared homing, refers to a passive missile guidance system, which uses the emission from a target of electromagnetic radiation in the infrared part of the spectrum to track it. Missiles that use infrared seeking are often referred to as "heat-seekers", since infrared (IR) is just below the visible spectrum of light in frequency and is radiated strongly by hot bodies. Many objects such as people, vehicle engines, and aircraft generate and retain heat, and as such, are especially visible in the infrared wavelengths of light compared to objects in the background. COUNT 5
QSN1 What is another term for infrared homing? ANS1 Infrared tracking QSN2 What devices make use of infrared homing? ANS2 Missiles QSN3 What is a common name for missiles that make use of infrared seeking? ANS3 heat-seekers QSN4 Along with aircraft and people, what objects notably create and retain heat? ANS4 vehicle engines QSN5 What does IR stand for? ANS5 infrared