Multiple choice

The principle of working of a periscope is based on

  1. Reflection only

  2. Refraction only

  3. Reflection and refraction

  4. Reflection and interference

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A periscope uses two plane mirrors placed parallel to each other at an angle of 45 degrees to reflect light downwards around obstacles. This operation relies entirely on the law of reflection without involving refraction.