Civil Engineering - Elements of Remote Sensing - Discussion

9. 

Coherence of two electromagnetic waves takes place if their phase difference is :

[A]. constant in time
[B]. constant in space
[C]. constant in time and space
[D]. None of these

Answer: Option C

Explanation:

No answer description available for this question.

Hari said: (Sep 11, 2017)  
Explain this one please.

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