Question : A periscope works on the principle of:
Option 1: refraction
Option 2: total internal reflection
Option 3: diffraction
Option 4: reflection
Correct Answer: reflection
Solution : The correct answer is reflection .
A periscope operates according to the law of reflection, which dictates that light from an object falls on one mirror at a 45° angle and is reflected. This reflected light then strikes another mirror and is reflected once again until it reaches the human eye. Light reflects when it bounces off an item.
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