What are periscopes?

A periscope is like a sneaky peek hole that lets you see things from around corners or over walls.

Imagine you're playing hide and seek in a hallway. You want to see who's hiding at the other end, but you can’t just walk all the way there. That’s where a periscope helps, it’s like having a special tunnel made of mirrors that lets light bounce from one side to the other.

A periscope has two mirrors, each at an angle inside a tube or box. When you look into one end, the light bounces off the first mirror and goes up to the second mirror, which sends it out through the other end. So even though you’re not there, you can see what’s happening on the other side, just like looking through a tunnel made of mirrors!

Periscopes are used by submarines when they're underwater. They let the sailors peek above the water without having to come all the way up. It’s like having a special spyglass that helps you see around corners or over walls, no magic needed, just clever use of mirrors!