Shattering of glass (Tutorial Question)

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Shattering of glass (Tutorial Question)

Post by Confusions allowed on Sun Aug 07, 2016 6:25 pm

First of all, I'd like to make clear that one cannot opt for direct answers of the questions in the tutorial. One can only ask for help in a certain difficulty related to the question.
Second, please, for the distinction purposes, put the question to be a tutorial question.
Now, here's my question :
What exactly happens when there's a crack in the glass, at the molecular level, considering that glass is amorphous?
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Re: Shattering of glass (Tutorial Question)

Post by The Confused Guy (O.o)? on Mon Aug 08, 2016 8:48 am

The intermolecular bonds break. Lol
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Re: Shattering of glass (Tutorial Question)

Post by Keep Guessing! on Tue Aug 09, 2016 12:19 am

And some bonds remain. Hence the crack.
When all the bonds break, it shatters.

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Re: Shattering of glass (Tutorial Question)

Post by Sreejith A Nair on Thu Aug 11, 2016 11:21 pm

The processes of breaking of glass is not as simple as it may seem. It is actually a topic under research. Some scintists say that it is due to the breaking of interatomic bonds while some say that it is due to the formation of microscopic cavities that are formed on the application of pressure. So if you are so passionate about that question you can come up with your own theories and can set-up experiments to prove it. All the best

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Re: Shattering of glass (Tutorial Question)

Post by Jibanananda Das on Sun Aug 14, 2016 11:09 am

If u closely observe shattered glass or a crack, it shines if observed from a specific angle. Means it reflects light. Reflection can occur only if there is an interface. So it's may not be simply breaking of bonds. Question is what is the second media of this interface? And of it is glass, then what causes the sharp change in refractive index? Remember glass is amorphous.

NB i hv supporting pics of this shining phenomena, but could not attach it. Can anyone briefly tell me how to attach pics here?

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Re: Shattering of glass (Tutorial Question)

Post by The Confused Guy (O.o)? on Sun Aug 14, 2016 11:59 am

this is how to attach pics

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Re: Shattering of glass (Tutorial Question)

Post by Mohamed hashim on Wed Aug 17, 2016 12:20 pm

I think
Since glass is amorphous there is no clear cut boundary
So when light goes through it , it will reflected or transmitted in different direction

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Re: Shattering of glass (Tutorial Question)

Post by Confusions allowed on Wed Aug 17, 2016 8:48 pm

Well, we do know that glass is amorphous, as it is supercooled. The amorphous structure can easily give loads of space in between, leading to transparency. But, when the glass is shattered, or even cracked, we can always argue that the glass gets crystalline. This is because of, one can say, increase in symmetry, as we do know that things in nature tend to go towards symmetry. Also, crystalline glass can be reflective and opaque at the same time, due to the close packing. This can explain the reflective cracks and opaque shattered glass. There still seem to be a lot of holes in the concept, but the argument seems correct. Please rectify, if it seems incorrect.
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