Q1. A periscope works on the principle of:
A Scattering of light
B Refraction of light
C Reflection of light Correct
D Diffraction of light
Explanation
A periscope uses plane mirrors or reflecting prisms to turn the path of light, allowing an observer to see over an obstacle or from a concealed position. Reflection of light is therefore the working principle. Scattering explains why light spreads in different directions in media such as air or water, not periscope viewing. Refraction is the bending of light while passing between media. Diffraction is bending around edges or through narrow openings, which is not the mechanism used here.