ELI5: Explain Like I'm 5

Fibre optic gyroscope

A fibre optic gyroscope is a special device that helps us know which way we are turning or moving. Imagine you are playing with a top and spinning it around. You can feel the top spinning and turning. Similarly, a fibre optic gyroscope can sense when we are turning or moving.

A fibre optic gyroscope is made up of a coil of hair-thin glass wires, called fibre-optic cables. These cables carry laser light through them. The light moves really fast inside the cables, and because the cables are coiled up, the light ends up going in circles.

When the fibre optic gyroscope starts moving or turning, something really cool happens! The light inside the cables gets twisted and turned in all sorts of different directions. This means that different amounts of light end up arriving at different places in the fibre optic cables.

The fibre optic gyroscope then measures how much light is arriving at each place and uses this information to figure out how much it’s been turned or moved. This way, we can use the fibre optic gyroscope to keep track of how much we turn or move, and this can help us figure out which direction we are going in.

Fibre optic gyroscopes are used in many things such as airplanes, ships, and even your phone’s GPS system. They help us navigate and move around accurately, and without them, we would not have the technology we do today!