In a periscope, how are the reflecting mirrors arranged?
A. Perpendicular to each other
B. At an angle of 45°
C. At an angle of 90°
D. At an angle of 60°
Answer:B
In a periscope, how are the reflecting mirrors arranged?
A. Perpendicular to each other B. At an angle of 45° C. At an angle of 90° D. At an angle of 60°