GATE CE 2016 Set 1 — Question 34
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Geomatics Engineering → Remote Sensing & GIS → Remote Sensing Principles
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Question
The system that uses the Sun as a source of electromagnetic energy and records the naturally radiated and reflected energy from the object is called
Correct answer
(C) Passive Remote Sensing
Solution
Passive remote sensing systems record electromagnetic radiation that is naturally reflected or emitted from the Earth's surface. The most common source of such radiation is the Sun. Active remote sensing systems, on the other hand, provide their own source of energy (e.g., RADAR, LiDAR).
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