Periscopes | MCQs

Explanation

In a periscope, mirrors are placed at 45° angles to reflect light down the tube.

This allows the viewer to see over or around obstacles.

Explanation

• A periscope requires a prism that can reflect light by 90 degrees, allowing the user to see around obstacles or over walls.
• An isosceles right-angled prism, also known as a 45-degree prism, is ideal for this purpose.
• It has two equal sides and a 90-degree angle between them, which allows for total internal reflection and a clear image.