Multiple choice

With the help of which instrument can a man in a submarine see objects on the surface of the sea?

  1. Gyroscope

  2. Telescope

  3. Periscope

  4. Sonar
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A periscope uses mirrors or prisms to reflect light, allowing submarines to see above the waterline while submerged. Sonar detects objects using sound but provides no visual image, telescopes require direct line of sight, and gyroscopes measure orientation.

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