What are ring laser gyroscopes?

A ring laser gyroscope is like a super-smart spinning toy that helps things know when they’re moving or turning.

Imagine you have two race cars going around a circular track, one clockwise, the other counterclockwise. If the track stays still, both cars go at the same speed. But if the whole track starts to turn, like a merry-go-round, one car will seem to go faster than the other. That’s how a ring laser gyroscope works!

Inside the ring laser gyroscope, there are two beams of light going around a loop, one clockwise, one counterclockwise. When something moves or turns, the beams travel different distances, and that difference tells the gyroscope exactly how much it’s turning.

It's like having a pair of really fast toy cars on a track, but instead of just watching them go, you're using their speed to figure out if the whole track is moving, just like how you know when your chair starts rolling under you!

This clever trick helps planes, ships, and even astronauts know which way they’re going without needing any outside help.