If we put two smooth glasses together (without glue them), normally what is the distance in between?

Question

In an ideal situation, let's say the two glass surfaces are perfectly smooth and 100% flat, and we superpose one of them onto the other, there should be an uniform distributed air-layer between the two pieces of glasses even though it looks we put them in direct contact, so what is the thickness of this air strip? round 10nm? or more than 1 μm?
Any guess is welcomed :)

sorry for the confusion caused by 'ideal situation', but even there was such an ideal surface, i still don't think the gap in between is 0. Can any chemical bond form automatically between the two surfaces? or Van de wal force? all these interactions can only be possible in the microscale of several angstroms (1Å=0.1nano or 0.0001micron).
Actually, regarding my question, I do mean it in a real world normal situation, in that case, any guess on roughly how thick is the air gap? thanks:)

Answer 1

If we put two smooth glasses together (without glue them), normally what is the distance in between?
In an ideal situation, let's say the two glass surfaces are perfectly smooth and 100% flat, and we superpose one of them onto the other, there should be an uniform distributed air-layer between the two pieces of glasses even though it looks we put them in direct contact, so what is the thickness of this air strip? round 10nm? or more than 1 μm?
Any guess is welcomed :)


if ur mentioning that it is an ideal situation - glass 100% smooth etc. then it is stupid of u to ask such a question.

There wud b no air gap b/w them.

(ur quest included so u may not modify it later)


Architectural glass is made from three principal raw materials, easily found in nature: silica, lime and sodium carbonate.
Avg size of molecular terrain would be approximately 300 - 3000A. (neglecting secondary composition of glass). Thus logically this has to be the thickness of this strip of air.

Answer 2

The more the glass is polished, the quicker the molecules will drift across the gap and form one piece.
Strap a piece of lead to a piece of gold, really tightly, leave it a couple years, and look at the result.

Answer 3

0 mm