Discussion
Remote sensing techniques make use of the properties ...................., emitted, reflected or diffracted by the sensed objects.
Answer: C
Remote sensing uses electromagnetic waves.
Remote sensing gathers information about objects without touching them, by recording the electromagnetic radiation they reflect, emit or scatter: visible and infrared light in optical sensors, thermal infrared in thermal sensors, and microwaves in radar and passive microwave instruments.
Sound waves are used in sonar and seismic surveys, not in remote sensing from aircraft and satellites. 'Electric waves' is not a separate kind of wave, and wind waves are waves on water.
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