High and Low Vacuum
Most recent answer: 10/22/2007
Q:
1)WHAT IS A VACCUM
2)I HAVE HEARD THERE IS A HIGH VACUUM AND A LOW VACUUM.
WHAT IS THE DIFFERENT.
3)HOW TO CREATE A HIGH AND LOW VACUUM
- KHALIP
SINGAPORE
- KHALIP
SINGAPORE
A:
Vacuum is actually a poor word sometimes. A vacuum is actually a place with less air than elsewhere. For instance, there is no air in outer space, so we call it a vacuum.
The important thing to know is how much less air there is inside the vacuum. That’s where the words Low and High come in. Low vacuum is around 10^-4 times the atmosphere. High vacuum is 10^-8 atmospheres. There is even Ultra-High vacuum that is around 10^-12 atmospheres. So when you say something has higher vacuum, it’s the same as saying that there is less air inside.
To get a vacuum, first you need a chamber that won’t let air leak back in or be crushed by the air that's outside when there is none inside. Then, you need a special pump that will pump the air out. The more leak-proof you can make the pump and the chamber, the higher level of vacuum you can get.
Adam
The important thing to know is how much less air there is inside the vacuum. That’s where the words Low and High come in. Low vacuum is around 10^-4 times the atmosphere. High vacuum is 10^-8 atmospheres. There is even Ultra-High vacuum that is around 10^-12 atmospheres. So when you say something has higher vacuum, it’s the same as saying that there is less air inside.
To get a vacuum, first you need a chamber that won’t let air leak back in or be crushed by the air that's outside when there is none inside. Then, you need a special pump that will pump the air out. The more leak-proof you can make the pump and the chamber, the higher level of vacuum you can get.
Adam
(published on 10/22/2007)