Classical electromagnetism and special relativity

Okay, imagine you have two toys, a ball and a car. When you push the ball, it moves slowly because it's light. But when you push the car, it moves faster because it's heavy.

Now imagine the ball and the car are actually tiny particles called electrons. When these electrons move, they create something called an electromagnetic field. This field is like an invisible force that can push and pull other particles like magnets do.

But here's the thing, according to a very smart scientist named Einstein, time and space are not absolute. They change depending on how fast you are moving. This is called special relativity.

So let's say you're in a car and you turn on a flashlight. To you, the light is moving away from the flashlight at the speed of light. But to someone outside the car, the light is still moving at the speed of light AND the car is moving too, so the light appears to be moving slower.

This is where classical electromagnetism and special relativity come together. The electromagnetic field reacts differently depending on how fast you're moving, and this is something scientists have to take into account when studying electricity and magnetism.

It's kind of like trying to throw a ball while standing still versus while running. The ball will go farther and faster when you're running, and the same goes for electrons and their electromagnetic fields when you're moving really fast.

So basically, classical electromagnetism is the study of how particles like electrons create magnetic and electric fields, and special relativity is the idea that time and space change depending on how fast you're moving, which affects the way these fields behave.