ELI5: Explain Like I'm 5

Vacuum engineering

Vacuum engineering is like cleaning your room, but in a really big room, like your house, or even bigger than that.

Let’s say you have a bunch of toys scattered all over the floor in your room. If you want to clean it, you would start picking up the toys and putting them away. Vacuum engineering is like that, except instead of toys, we’re trying to clean up really tiny things called particles that are floating around in the air, but we can’t see them because they’re too small.

We use something called a vacuum pump, which is like a really powerful vacuum cleaner. It sucks all the air out of a room, so that there’s no air left inside. When all the air is gone, the particles can’t float around anymore because there’s nothing for them to float in, so they settle on the floor, like your toys would.

Scientists use vacuum engineering for a lot of different things. For example, they might want to study how things behave in a vacuum, like how certain chemicals react with each other without air getting in the way. Or, they might want to make tiny electronic parts, like the ones in your phone, without any particles getting in the way and messing things up.

Vacuum engineering is really important for a lot of things we use every day, even if we don’t realize it. Without it, making things like electronics or medicine would be a lot more difficult, and we might not have some of the cool things we enjoy today!