What is the normal state of the glass? Detailed answer

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What is the normal state of the glass? Detailed answer

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What is the normal state of the glass?

Solid.

You may have heard more than once that glass is a liquid that has cooled but not crystallized and that simply flows fantastically slowly. This is not true - glass bona fide (Really, truly (lat.).) is hard.

In support of claims that glass is a liquid, people often cite church stained-glass windows as an example: they point to the lower part of the window, where the glass is thicker.

However, the reason here is not at all that the glass has flowed down over time. Medieval glaziers sometimes simply could not cast perfectly uniform glass sheets. In such cases, they inserted the glass into the stained glass window with a thick edge to the floor - for obvious reasons.

The confusion about whether glass is a liquid or a solid arose from a misreading of the work of the German physicist Gustav Tammann (1861 - 1938), who studied the properties of glass and described its behavior as it solidified.

According to Tammann's observations, the molecular structure of glass is disordered - in contrast to the clear and neat arrangement of molecules, say, in metals.

Looking for an analogy, the scientist compared glass to a "supercooled liquid." But to say that glass is like a liquid does not mean that glass is a liquid.

Today, solids are divided into crystalline and amorphous. Glass is an amorphous solid.

Author: John Lloyd, John Mitchinson

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