Q.

Remote-sensing device has an inbuilt source of –

A. X-ray
B. g-ray
C. Ultraviolet ray
D. Infrared ray
Answer» D. Infrared ray
Explanation: Infrared imaging is used extensively for military and civilian purposes. Military applications include target acquisition, surveillance, night vision, homing and tracking. Non-military uses include thermal efficiency analysis, environmental monitoring, industrial facility inspections, remote temperature sensing, short-ranged wireless communication, spectroscopy, and weather forecasting.
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