Okay kiddo, have you ever seen a bunch of different colored pencils in a box? You know how each pencil has a different color, right? Well, just like pencils, atoms also have different colors called spectral lines.
Now, let's say there's a bunch of atoms with different colors mixed together. We want to separate them so we can study each one separately. That's where the atomic line filter comes in!
The atomic line filter is like a special tool that can only let one color pass through at a time. It's kind of like how a strainer can separate different sized pasta, but instead of pasta, we're filtering light.
First, we put the mixed light into the filter, and it's like a bunch of pencils in a box! Then, the filter looks at each atom's color and decides which one to let through. Only one color can pass through at a time, just like only one pencil can come out of the box at a time.
Finally, we have individual colors separated, and we can study each color separately! Scientists use this tool to learn more about the atom's properties and what makes them different from each other.