Magnetic deflection

So, you know magnets, right? They're like really strong stickers that can stick to metal things. When you play with magnets, you might have noticed that sometimes they pull each other closer and sometimes they push each other away.

Now imagine that instead of just playing with magnets, we use them to control tiny particles that are moving really, really fast. These particles could be things like electrons that are traveling through a tube called a cathode ray tube, which is like a fancy TV.

When we use magnets to control these particles, we can make them move in different directions by either pulling them in or pushing them away. This is called magnetic deflection. By controlling how the particles move, we can create pictures on a screen or even measure things like the strength of an electric current.

So basically, magnetic deflection is a way of using magnets to control tiny particles and make them move in different directions. It's like playing with a big magnet puzzle, but with really small pieces that move super fast!