What is the basic difference between active and passive remote sensing?
(a.) Source of energy
(b.) Direction of energy
(c.) Source of sensor
(d.) Position of sensor
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The 2 Types of Remote Sensing
Active sensors have its own source of light or illumination. In particular, it actively sends a pulse and measures the backscatter reflected back to the sensor. But passive sensors measure reflected sunlight emitted from the sun. When the sun shines, passive sensors measure this energy.
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