Multiple choice

Name the instrument with the help of which a sailor in a submarine can see objects on the surface of the sea.

  1. Telescope

  2. Periscope

  3. Gyroscope

  4. Stereoscope
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A periscope is an optical instrument that uses a system of prisms, lenses, or mirrors to allow an observer to see objects that are not in their direct line of sight, such as from a submerged submarine.

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