Question

Periscope is built on the concept of

• A. refraction of light
• B. reflection of light
• C. dispersion of light
• D. scattering of light

Answer 1

The correct option is B reflection of light

Periscope is an instrument used for observation around or through an obstacle that prevents direct line-in-sight observation from the observer position.

The light from one end enters the periscope which then reflects at the first mirror and then on the second mirror before finally going out of the periscope to the observer's eyes.

So, the working principle of periscope is reflection of light through the two mirrors.