The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called________________? | MCQ Hive

Civil Engineering MCQs

Q The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called________________?

A A. Sensors
B B. Passive sensors
C C. Active sensors
D D. None of these

Previous Orbital radius of GPS satellites is approximately _____…

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