Civil Engineering MCQAE Level Civil Engineering
The principle of working of an optical square is based on:
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Choose the correct answer
A
refraction
B
reflection
C
double refraction
D
double reflection
Correct Answer
D. double reflection
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An optical square uses two mirrors and the principle of double reflection to set out right angles
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This MCQ belongs to WBPSC AE Previous Years Questions Series. Full tests include timed attempts, rank comparison and subject-wise analysis.