Civil Engineering - Elements of Remote Sensing - Discussion

16. 

A passive sensor uses :

[A]. sun as the source of energy
[B]. flash light as a source of energy
[C]. its own source of energy
[D]. None of these

Answer: Option A

Explanation:

No answer description available for this question.

Deep said: (Jun 9, 2021)  
Active- it's own source of energy.

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