# I Dimensions of vacuum tube

1. Nov 4, 2017

### Kamil19991

Hello
For the purpose of the experiment, I wonder what the maximum dimensions can have a transparent tube, I thought over a diameter of 30cm and a length of 1-1,5m and from what material should such a pipe be made. I would like to get a high vacuum (about 0,2-2Pa)

2. Nov 4, 2017

### phinds

I don't see how you can specify a theoretical limit since you could just make thicker and thicker glass tubes as the size goes up. What's your point in asking?

3. Nov 4, 2017

### Kamil19991

So what thickness should the glass have in such a size to withstand?

4. Nov 4, 2017

5. Nov 4, 2017

### Kuzon

OP have you tried using a parabolic function?

6. Nov 5, 2017

### NTL2009

How long is a string?

7. Nov 5, 2017

### Mister T

Trying to find out why someone is asking a question can in fact be the most constructive approach, in my experience. Often the questioner doesn't have a well-formed question, and so attempting to answer it is not very constructive.