FORESTRY
REMOTE SENSING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Below is a true statement about energy sources in remote sensing
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Active systems are systems that use artificial energy such as microwaves
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Passive systems are systems that use the sun’s gravity
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Passive systems are systems that use artificial energy such as microwaves
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Active systems are systems that use sunlight
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Explanation:
Detailed explanation-1: -The remote sensing system that uses electromagnetic energy can be termed as electromagnetic remote sensing. Remote sensors can be broadly classified as passive sensors and active sensors. Sensors which sense natural radiation, either emitted or reflected from the earth are called passive sensors.
Detailed explanation-2: -Applications of passive microwave remote sensing include meteorology, hydrology, and oceanography. By looking “at", or “through” the atmosphere, depending on the wavelength, meteorologists can use passive microwaves to measure atmospheric profiles and to determine water and ozone content in the atmosphere.
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