Question

Which of the following is not the proper use of a periscope?

• A. A periscope is used by scientists to see planetary bodies which are not seen by telescopes
• B. A periscope is used in submarines to see objects on the surface of water
• C. A periscope is used by soldiers, present in trench, to observe the movement of the enemy
• D. A periscope is used to observe football match beyond the boundary wall of a playground

Answer 1

The correct option is A A periscope is used by scientists to see planetary bodies which are not seen by telescopes

Images seen through periscopes are not magnified. So, cannot be used to observe the planetary bodies.

Periscope, optical instrument used in land and sea warfare, submarine navigation, and elsewhere to enable an observer to see his surroundings while remaining undercover, behind armor, or submerged.