ELI5: Explain Like I'm 5

Bellini–Tosi direction finder

So imagine you are playing a game of hide and seek. You need to find your friend who is hiding somewhere in your big backyard.

Now, let's say you have a special toy that can help you find your friend. This toy is called a Bellini-Tosi Direction Finder.

When you turn on the Bellini-Tosi Direction Finder, it starts listening to different sounds around you. Just like you can hear things like birds chirping or cars passing by, the Bellini-Tosi Direction Finder can hear different radio signals.

Now, every time you move in a direction, the Bellini-Tosi Direction Finder can tell you which radio signals are getting stronger or weaker. It's like the toy is telling you which direction your friend's voice is getting louder or quieter.

So you start walking around your backyard with the Bellini-Tosi Direction Finder, and with its help, you soon start to hear the strongest radio signal. This is like hearing your friend's voice loudly and clearly saying "I am here!"

So you follow the direction where the Bellini-Tosi Direction Finder is pointing, and after a few minutes, you finally find your friend hiding behind a tree.

The Bellini-Tosi Direction Finder is like a special toy that helps you find things that you can't see or hear with your naked eyes or ears. It listens to different radio signals and tells you which direction you should walk in order to find what you're looking for.