Multiple choice general knowledge

For seeing objects at the surface of water from a submarine under water, the instrument used is

  1. kaleidoscope

  2. periscope

  3. spectroscope

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

A periscope is an optical instrument that uses mirrors or prisms to allow viewing objects that are not in the direct line of sight, essential for submarines to observe the surface while submerged. It works on the principle of multiple reflections. Kaleidoscopes create symmetrical patterns, spectroscopes analyze light spectra, and telescopes magnify distant objects but cannot see around obstacles.

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