Metal detectors

Bleep bleep! Bleep bleep! Is there anything more exciting than discovering treasure? Millions of people all around the world have fun using metal detectors to uncover valuable relics buried underground. Exactly the same technology is at work in our military and security services, helping to keep the world safe by uncovering guns, knives, and buried mines. Metal detectors are based on the science of electromagnetism. Let's find out how they work! https://www.explainthatstuff.com/metaldetectors.html#:~:text=A%20metal%20detector%20contains%20a,magnetic%20field%20move%20around%20too.