Relativistic particle

Okay, so you know how when you run really, really fast, you feel like time goes by faster for you? Well, that's because of something called relativity.

Now, let's say you're a tiny particle moving really, really fast. When a particle moves at a very high speed, it starts to act differently than if it was just sitting still. This is called being relativistic.

When a particle is going really, really fast, it starts to get heavier and time slows down for it. Scientists use a special equation, called the Lorentz transformation, to figure out how the particle will change when it's going super fast. It's kinda like a map that tells them where the particle will be and how it will behave at different speeds.

So, to sum it up, a relativistic particle is a tiny thing that's moving super, super fast and acts differently than if it was just sitting still. Scientists use a special map, called the Lorentz transformation, to figure out how it will behave at different speeds.