General Principles in the Working of Periscope NDA Questions

NDA Physics

General Principles in the Working of Periscope MCQ Questions


7.
What material are modern submarine periscope lenses made of?
A.
Glass
B.
Plastic
C.
Sapphire
D.
Diamond
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ANSWER :
C. Sapphire
8.
What technology allows periscopes to be used at night?
A.
LED lights
B.
Thermal imaging
C.
Infrared sensors
D.
Night vision goggles
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ANSWER :
B. Thermal imaging
9.
Which optical component is essential for a basic periscope?
A.
Lens
B.
Prism
C.
Mirror
D.
Filter
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ANSWER :
C. Mirror
10.
What feature allows modern periscopes to provide a wider field of view?
A.
Optical zoom
B.
Panoramic lenses
C.
Rotating head
D.
Larger mirrors
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ANSWER :
C. Rotating head
11.
What is the main use of periscopes in submarines?
A.
Navigating underwater
B.
Observing above the surface while submerged
C.
Depth measurement
D.
Torpedo guidance
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ANSWER :
B. Observing above the surface while submerged
12.
Which type of mirror is used in a basic periscope?
A.
Concave
B.
Convex
C.
Plane
D.
Parabolic
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ANSWER :
C. Plane