Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 3 (Q.No. 30)
30.
The construction of optical square is based, on the principle of optical
reflection
refraction
double refraction
double reflection.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
22 comments Page 3 of 3.

Amrul said:   6 years ago
Right, Agree @Nitin Mishra.

Vikram kadam said:   8 years ago
Why only reflection?


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