Civil Engineering MCQJE Level Civil Engineering
The angle between the two plane mirrors of an optical square is
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Choose the correct answer
A
60 degrees
B
45 degrees
C
90 degrees
D
30 degrees
Correct Answer
B. 45 degrees
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The two mirrors of an optical square are set at 45 degrees so that the line of sight is turned through 90 degrees.
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This MCQ belongs to WBPSC JE (Civil) Previous Years Questions Series. Full tests include timed attempts, rank comparison and subject-wise analysis.